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8. Pellionia Gaudichaud-Beaupré, Voy. Uranie, Bot. 494. 1830.
[nom. cons.]
赤车属 chi che shu
Lin Qi (林祁); Ib Friis, C. Melanie Wilmot-Dear
Polychroa Loureiro, nom. rej.
Herbs or subshrubs, without stinging hairs. Leaves apparently alternate, distichous; nanophylls present or absent, opposite to normal leaves; stipules 2; leaf blade 3-veined, one major lateral vein sometimes inserted above the base, or pinnately veined, base asymmetric, margin entire or serrate; cystoliths mostly present, linear or fusiform. Inflorescences axillary, cymes of unisexual flowers (plants monoecious or dioecious); male ones usually pedunculate; female ones pedunculate or sessile, bracteose, rarely with discoid receptacle and involucre. Male flowers: perianth lobes 4 or 5, elliptic, connate 1/2 of length, slightly valvate, apex usually corniculate; stamens as many as and opposite to perianth lobes; filaments inflexed in bud; rudimentary pistil small. Female flowers: perianth lobes 4 or 5, distinct, longer than or as long as ovary, usually unequal, apex usually corniculate; staminodes as many as and opposite to perianth, scale-like. Ovary straight, ellipsoid; style absent; stigma penicillate; ovule orthotropous. Achenes ovoid or ellipsoid, slightly flattened, usually tuberculate.
About 60 species: tropical and subtropical Asia, Pacific islands; 20 species (nine endemic) in China.
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| 1 |
Leaf blade margin entire. |
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(2) |
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Leaf blade margin denticulate, dentate, crenate, serrate or nearly undulate. |
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(3) |
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| 2 (1) |
Petioles 0.5-2 cm. |
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1 P. heyneana |
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Petioles 4-19 cm. |
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2 P. latifolia |
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| 3 (1) |
Plants with nanophylls. |
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(4) |
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Plants without nanophyll. |
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(5) |
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| 4 (3) |
Stems prostrate, terete. |
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3 P. repens |
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Stems erect, winged or sharply, longitudinally angled. |
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16 P. caulialata |
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| 5 (3) |
Achenes smooth or striolate; leaf blade pinnately veined, without distinct major lateral veins. |
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(6) |
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Achenes tuberculate; leaf blade with one or both major lateral veins inserted above base or pinnately veined, without distinct major lateral veins. |
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(8) |
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| 6 (5) |
Herbs monoecious. |
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20 P. brachyceras |
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Herbs dioecious. |
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(7) |
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| 7 (6) |
Leaf blade 14-25 cm. |
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17 P. macrophylla |
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Leaf blade 4-10 cm. |
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18 P. incisoserrata |
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| 8 (5) |
Leaf blade peltate at base. |
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15 P. viridis |
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Leaf blade not peltate at base. |
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(9) |
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| 9 (8) |
Leaf blade pinnately veined, without distinct major lateral veins. |
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(10) |
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Leaf blade with major lateral veins asymmetric, one inserted above base. |
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(11) |
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| 10 (9) |
Leaf blade with cystoliths. |
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13 P. grijsii |
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Leaf blade without cystolith. |
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14 P. yunnanensis |
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| 11 (9) |
Herbs. |
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(12) |
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Subshrubs. |
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6 P. scabra |
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| 12 (11) |
Most leaf axils with a single leaf much smaller than the subtending leaf. |
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(13) |
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Leaf axils without such leaves. |
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(14) |
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| 13 (12) |
Stems ascending, unbranched, hairy; achene tuberculate. |
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8 P. veronicoides |
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Stems erect, branched, glabrous; achene smooth. |
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19 P. leiocarpa |
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| 14 (12) |
Male peduncles 11-13 cm. |
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4 P. longipedunculata |
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Male peduncles 0-6(-9) cm. |
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(15) |
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| 15 (14) |
Leaf blade up to 15 cm, petiole up to 7 mm. |
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(16) |
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Leaf blade 0.5-8 cm, petiole 0-4 mm. |
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(17) |
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| 16 (15) |
Leaf blade nearly undulate or undulate-crenate; cuneate at base. |
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11 P. paucidentata |
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Leaf blade crenate; obtuse or auriculate at base. |
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12 P. heteroloba |
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| 17 (15) |
Leaf apex rounded or obtuse. |
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10 P. brevifolia |
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Leaf apex acute, caudate or acuminate. |
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(18) |
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| 18 (17) |
Stipules triangular, 1-1.8 mm wide. |
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5 P. retrohispida |
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Stipules subulate, 0.1-0.2 mm wide. |
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(19) |
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| 19 (18) |
Stems densely retrorse-strigose. |
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7 P. acutidentata |
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Stems glabrous or puberulent. |
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9 P. radicans |
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List of lower taxa
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