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Herbs stemless. |
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(2) |
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Herbs with stems (0.7-)3-62 cm. |
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(11) |
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| 2 (1) |
Leaf blade elliptic to oblong, ovate, or oblanceolate, not lobed, base cuneate to rounded, pinnately veined, herbaceous or papery; calyx 5-sect from base. |
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(3) |
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Leaf blade ovate to orbicular, triangular, oblate, or reniform, often lobed, base cordate to truncate, palmately veined (then leaf blade papery) or rarely pinnately veined (then leaf blade leathery); calyx shallowly 5-lobed (rarely 5-sect from or near base). |
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(5) |
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| 3 (2) |
Leaf blade shorter than 5 cm, densely white woolly; calyx segments 2-2.5 mm |
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24 Didymocarpus niveolanosus |
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Leaf blade 2.2-20 cm (mostly over 5 cm), densely appressed puberulent or short strigose; calyx segments 2.5-7 mm. |
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(4) |
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| 4 (3) |
Leaf blade to 20 X 10.5 cm, densely appressed puberulent; filaments sparsely puberulent and glandular; pistil puberulent; corolla yellow |
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22 Didymocarpus mollifolius |
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Leaf blade to 10 X 3.6 cm, sparsely short strigose; filaments glabrous; pistil sparsely glandular; corolla pale purple |
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23 Didymocarpus hancei |
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| 5 (2) |
Calyx divided from or near base; tube to 2 mm. |
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(6) |
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Calyx divided from or near middle, tube at least 4 mm. |
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(8) |
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| 6 (5) |
Leaf blade not lobed, margin obtusely dentate or double dentate, apex obtuse; corolla yellow, tube funnelform-cylindric, mouth 3-4 mm in diam. |
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25 Didymocarpus subpalmatinervis |
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Leaf blade distinctly or indistinctly multilobed, margin denticulate to serrate or entire, apex rounded; corolla pink, tube funnelform-tubular to campanulate, mouth 1-1.3 cm in diam. |
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(7) |
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| 7 (6) |
Calyx lobes broadly lanceolate, oblanceolate-linear, or triangular, 3-4 mm, margin sparsely denticulate; corolla 2.5-3.2 cm, puberulent outside; anthers puberulent; staminodes 3; leaf blade 3-9 X 3.5-11 cm, eglandular |
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26 Didymocarpus heucherifolius |
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Calyx lobes spatulate-linear or narrowly obovate, 6-8 mm, margin entire; corolla 1.5-1.8 cm, glabrous outside; anthers white woolly; staminodes 2; leaf blade 1.8-4.6 X 1.6-4 cm, sparsely yellow glandular |
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27 Didymocarpus sinoprimulinus |
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| 8 (5) |
Leaf blade leathery, pinnately veined; calyx slightly zygomorphic, ca. 13 mm, lobes unequal, abaxial lobe ca. 7 mm, others 2.5-3.5 mm; anthers glabrous; staminodes 2 |
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28 Didymocarpus yuenlingensis |
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Leaf blade papery, palmately veined; calyx actinomorphic, 7-9 mm, lobes equal, 1-3 mm; anthers white woolly or puberulent; staminodes 3. |
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(9) |
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| 9 (8) |
Bracts semiorbicular, adaxially pubescent, abaxially villous; calyx lobes depressed oblong, overlapping; filaments ca. 15 mm; anthers ca. 5 mm; staminodes 2-3 mm; style glabrous |
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31 Didymocarpus salviiflorus |
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Bracts ovate to elliptic or narrowly oblong, abaxially puberulent to sparsely so; calyx lobes ovate-triangular to triangular, not overlapping; filaments 6-10 mm; anthers 2.5-3 mm; staminodes 0.5-0.8 mm; style puberulent or sparsely so. |
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(10) |
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| 10 (9) |
Leaf blade orbicular-ovate to orbicular or triangular, 4.6-10 X 3.2-9 cm; bract margin entire; pedicel 4-10 mm; calyx lobe margin denticulate; corolla white, puberulent outside, adaxial lip 5-6 mm, abaxial lip 7-9 mm; anthers white woolly |
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29 Didymocarpus cortusifolius |
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Leaf blade reniform or orbicular-reniform, 2-4.5 X 3.5-7.5 cm; bract margin few crenate; pedicel 11-18 mm; calyx lobe margin entire; corolla pink, glabrous outside, adaxial lip ca. 1 cm, abaxial lip ca. 16 mm; anthers sparsely puberulent |
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30 Didymocarpus reniformis |
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| 11 (1) |
Calyx divided from base into 3 or 5 segments, without a tube. |
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(12) |
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Calyx not divided from base, 2-lipped or 5-lobed, tube 1.5-9 mm. |
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(17) |
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| 12 (11) |
Calyx actinomorphic or slightly zygomorphic, 5-sect, segments of same width. |
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(13) |
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Calyx zygomorphic, 3-sect, adaxial lip 2-3 X wider than abaxial 2 segments. |
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(15) |
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| 13 (12) |
Stems to 5.5 cm; petiole 3-12 cm; leaf blade broadly ovate to orbicular, base cordate to truncate, palmately veined; peduncle 6-15 cm; calyx slightly zygomorphic, segments unequal in length |
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3 Didymocarpus margaritae |
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Stems 10-30 cm; petiole 0.2-5 cm; leaf blade elliptic to ovate or oblong, base rounded to cuneate, pinnately veined; peduncle 2.3-7 cm; calyx actinomorphic, segments equal in length. |
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(14) |
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| 14 (13) |
Leaf blade 2.5-4.8 cm; lateral veins 6 or 7 on each side of midrib; peduncle glabrous; corolla 2.5-3 cm; filaments ca. 7 mm; pistil ca. 2 cm |
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1 Didymocarpus medogensis |
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Leaf blade 4-18.5 cm; lateral veins 8-11 on each side of midrib; peduncle sparsely glandular puberulent or pilose; corolla 1.6-2.2 cm; filaments ca. 3.5 mm; pistil ca. 1.1 cm |
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2 Didymocarpus glandulosus |
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| 15 (12) |
Calyx 2-3 mm, adaxial segment 3-lobed from near middle, outer surface glabrous |
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4 Didymocarpus zhenkangensis |
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Calyx 4-5 mm, adaxial segment shallowly 3-lobed, outer surface puberulent or sparsely glandular puberulent. |
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(16) |
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| 16 (15) |
Leaf blade to 9 cm wide; cymes 3-15-flowered; peduncle 4-8 cm; adaxial calyx lip ca. 3 mm wide, lobes triangular, 2 abaxial calyx segments oblong, ca. 1.5 mm wide; corolla adaxial lip ca. 3 mm, abaxial lip ca. 7 mm; anthers puberulent; staminodes 2 |
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5 Didymocarpus pseudomengtze |
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Leaf blade to 4.3 cm wide; cymes 1-3-flowered; peduncle 1.8-3.5 cm; adaxial calyx lip ca. 1.5 mm wide, lobes lanceolate-linear, 2 abaxial calyx segments narrowly lanceolate, 0.8-0.9 mm wide; corolla adaxial lip ca. 1.8 mm, abaxial lip ca. 4 mm; anthers glabrous; staminodes absent |
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6 Didymocarpus stenocarpus |
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| 17 (11) |
Calyx actinomorphic, 2-3 mm, 5-lobed nearly from middle; corolla mouth ca. 2.5 mm in diam.; staminodes absent; ovary appressed puberulent |
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8 Didymocarpus silvarum |
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Calyx slightly to strongly zygomorphic, 3-12 mm, indistinctly to distinctly 2-lipped; corolla mouth 3-10 mm in diam.; staminodes 1-3 (unknown in D. nanophyton); ovary glabrous, rarely densely glandular puberulent, minutely glandular, or sparsely puberulent. |
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(18) |
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| 18 (17) |
Calyx tuberculate outside; stems 2.5-7 cm; leaf blade 2.5-4.5 X 1.5-3 cm |
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15 Didymocarpus nanophyton |
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Calyx smooth outside; stems 3-30(-62) cm; leaf blade 1-15(-26) X 1-10(-16) cm. |
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(19) |
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| 19 (18) |
Corolla 2.5-4.5 cm. |
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(20) |
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Corolla to 2.4 cm. |
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(24) |
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| 20 (19) |
Calyx 10-12 mm; pistil sparsely puberulent or minutely glandular. |
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(21) |
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Calyx 3-6 mm; pistil glabrous, eglandular. |
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(22) |
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| 21 (20) |
Petiole to 2.5(-5) cm; leaf blade to 5.5 cm wide, adaxially densely appressed puberulent; peduncle glandular puberulent; corolla ca. 3 cm, mouth ca. 3.5 mm in diam.; anthers glabrous; ovary minutely glandular |
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20 Didymocarpus praeteritus |
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Petiole to 11 cm; leaf blade to 10.5(-16) cm wide, adaxially sparsely appressed puberulent to glabrous; peduncle glabrous; corolla 3.2-4.5 cm, mouth 9-10 mm in diam.; anthers puberulent; ovary sparsely puberulent |
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21 Didymocarpus purpureobracteatus |
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| 22 (20) |
Corolla sparsely pubescent outside, mouth 4-6 mm in diam.; adaxial leaf surface eglandular; bracts 2-20 mm, often leaflike, margin crenate to entire |
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19 Didymocarpus yunnanensis |
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Corolla glabrous outside, mouth 7-8 mm in diam.; adaxial leaf surface with yellow or orange glands (at least sparsely); bracts 3-6 mm, never leaflike, margin entire. |
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(23) |
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| 23 (22) |
Stem leaves in 2 whorls; petiole to 7 cm; leaf blade adaxially sparsely yellow glandular, base oblique, cuneate to cordate; peduncle to 4 cm; bracts free; calyx 3-4.5 mm; staminodes 3, 1.8-3.6 mm |
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12 Didymocarpus pulcher |
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Stem leaves opposite; petiole to 2.5 cm; leaf blade adaxially orange glandular, base oblique, broadly cuneate; peduncle 5.5-9 cm; bracts connate at base; calyx 5-6 mm; staminodes 2, ca. 6 mm |
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17 Didymocarpus leiboensis |
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| 24 (19) |
Leaves crowded near stem apex, nodes indistinct; leaves sparsely yellow glandular on both surfaces; staminode 1. |
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(25) |
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Leaves spread along stem or sometimes apical nodes dense, opposite, rarely whorled or basal few alternate, nodes 1-5; leaves eglandular, sometimes sparsely yellow, red, or purple glandular; staminodes 2 or 3. |
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(26) |
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| 25 (24) |
Stems spreading villous; lateral veins 3 or 4 on each side of midrib; bracts ca. 2 mm; calyx tube 2.2-2.5 mm |
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11 Didymocarpus villosus |
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Stems sparsely appressed puberulent; lateral veins 6-8 on each side of midrib; bracts 4-7 mm; calyx tube 3.5-4 mm |
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13 Didymocarpus primulifolius |
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| 26 (24) |
Abaxial leaf surface sparsely red glandular; petiole 0.5-10 cm; leaf blade ovate to reniform; pedicel ca. 2 mm |
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14 Didymocarpus grandidentatus |
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Abaxial leaf surface yellow glandular or eglandular; petiole 0.1-3.5(-4.7) cm; leaf blade elliptic to broadly ovate or obovate, rarely triangular, oblong, or rhombic; pedicel usually over 2 mm. |
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(27) |
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| 27 (26) |
Adaxial leaf surface sparsely purple glandular; bracts connate basally; anthers glabrous; ovary ca. 6 mm, densely glandular puberulent |
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18 Didymocarpus adenocalyx |
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Adaxial leaf surface eglandular or yellow glandular; bracts free or sometimes connate basally (in some D. stenanthos); anthers glabrous, rarely puberulent; ovary 10-15 mm, glabrous. |
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(28) |
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| 28 (27) |
Corolla puberulent outside, tube funnelform, mouth ca. 6 mm in diam.; filaments ca. 6 mm; leaf blade base cordate-auriculate |
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9 Didymocarpus zhufengensis |
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Corolla glabrous outside, tube cylindric or nearly tubular, mouth 3-4 mm in diam.; filaments 3-4 mm; leaf blade base cuneate to cordate. |
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(29) |
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| 29 (28) |
Leaves mostly opposite, basal 2 often alternate, leaf blade 2-6.8(-11) X 1.3-4.2(-5.6) cm, sometimes yellow glandular; cymes 2-5-flowered; calyx slightly zygomorphic, 5-lobed, lobes nearly equal, sparsely glandular puberulent outside; staminodes 2.5-4 mm |
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10 Didymocarpus aromaticus |
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Leaves opposite, leaf blade 2-11.5(-15) X 1.8-6.8 cm, adaxial surface eglandular, abaxial surface eglandular or sometimes very sparsely yellow glandular; cymes 5- to many flowered; calyx zygomorphic, 2-lipped from near middle, adaxial lip 3 lobed, abaxial lip 2-lobed, glabrous outside; staminodes 0.3-1.2 mm. |
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(30) |
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| 30 (29) |
Leaf blade abaxial surface sparsely pubescent and very sparsely yellow glandular; bracts free; anthers glabrous |
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7 Didymocarpus mengtze |
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Leaf blade abaxial surface puberulent along veins, eglandular; bracts connate at base or free; anthers nearly glabrous |
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16 Didymocarpus stenanthos |
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