|
7. Isometrum Craib, Notes Roy. Bot. Gard. Edinburgh. 11: 250. 1919.
金盏苣苔属 jin zhun ju tai shu
Herbs, perennial, epipetric or terrestrial, rhizomatous, stemless. Leaves many, basal; leaf blade puberulent to villous, tomentose, or glabrescent, base narrowly cuneate to cordate. Inflorescences cymes, rarely umbel-like, lax or rarely dense, axillary, 2- to many flowered; bracts 2(or 3), opposite, rarely whorled. Calyx actinomorphic, 5-sect from base; segments equal. Corolla white to purple or pink, rarely yellow, zygomorphic, rarely actinomorphic, inside glabrous or sparsely puberulent, rarely pilose on lobes; tube campanulate, cylindric, rarely urceolate or salverform, not swollen, 1-4 X longer than limb, 3-11 mm in diam.; limb slightly 2-lipped; adaxial lip 2-lobed from near middle, shorter than to nearly equalling abaxial lip; abaxial lip 3-sect from base, lobes equal or subequal, apex rounded, sometimes crenulate. Stamens 4, adnate to corolla tube near base, rarely to or above middle, included; anthers basifixed, coherent in pairs, rarely free, thecae divergent at base, not or rarely confluent at apex, dehiscing longitudinally from arcuate slits; connective not projecting; staminode 1, adnate to adaxial side of corolla tube. Disc ringlike. Ovary narrowly oblong to oblong or ovoid, 1-loculed; placentas 2, parietal, projecting inward, 2-cleft. Stigmas 2, equal, oblate, undivided. Capsule straight in relation to pedicel, narrowly oblong to oblanceolate, much longer than calyx, dehiscing loculicidally to base; valves 2, straight, not twisted. Seeds unappendaged.
* Fourteen species: endemic to China.
|
|
|
|
| 1 |
Corolla tube 1-2 X longer than broad; pistil glabrous. |
|
(2) |
| + |
Corolla tube 1.5-5 X longer than broad; pistil glabrous or puberulent to pubescent. |
|
(5) |
| |
|
|
|
| 2 (1) |
Corolla puberulent outside; leaf blade adaxially densely brown villous, abaxially densely brown long woolly |
|
2 Isometrum glandulosum |
| + |
Corolla glabrous outside; leaf blade adaxially puberulent, puberulent-strigillose, or sparsely brown villous, abaxially puberulent to pubescent or sparsely villous. |
|
(3) |
| |
|
|
|
| 3 (2) |
Stamens free, anther thecae confluent; leaf blade margin lobed, lobes triangular, deeply serrate to dentate; lateral veins 7-13 on each side of midrib; bract and sepal margin sparsely dentate |
|
1 Isometrum eximium |
| + |
Stamens coherent in pairs, anther thecae not confluent; leaf blade margin serrate, at least near apex; lateral veins 3-5 on each side of midrib; bract and sepal margin entire. |
|
(4) |
| |
|
|
|
| 4 (3) |
Petiole to 1.5 cm; leaf blade base cuneate; peduncle villous, glabrescent; corolla tube campanulate; pistil 6-7 mm |
|
3 Isometrum fargesii |
| + |
Petiole to 8.3 cm; leaf blade base cordate; peduncle puberulent and glandular puberulent; corolla tube urceolate; pistil 3.8-4 mm |
|
4 Isometrum nanchuanicum |
| |
|
|
|
| 5 (1) |
Leaf blade margin lobulate. |
|
(6) |
| + |
Leaf blade margin subentire or sinuous to coarsely crenate-dentate. |
|
(10) |
| |
|
|
|
| 6 (5) |
Corolla tube campanulate-tubular to narrowly campanulate; petiole to 2 cm. |
|
(7) |
| + |
Corolla tube nearly cylindric; petiole to 4 cm. |
|
(8) |
| |
|
|
|
| 7 (6) |
Leaf blade 1-1.8 cm wide; corolla 1-1.5 cm, adaxial lip lobes ca. 2 X 5 mm; stamens 6-8.5 mm, filaments sparsely puberulent to glabrous; pistil glabrous |
|
6 Isometrum farreri |
| + |
Leaf blade 2-3 cm wide; corolla 1.6-2 cm, adaxial lip lobes 4-6 X 3-4 mm; stamens 3-4 mm, filaments glabrous; pistil pubescent |
|
7 Isometrum giraldii |
| |
|
|
|
| 8 (6) |
Leaf blade oblanceolate, 1.5-5 X 0.8-1.5 cm, margin lobes subentire to shallowly crenulate; lateral veins 3-5 on each side of midrib; peduncle 4-6 cm; bract 1.8-2 mm |
|
14 Isometrum pinnatilobatum |
| + |
Leaf blade narrowly elliptic to ovate or elliptic, 2.7-10.5 X 2.3-5.5 cm, margin lobes crenate- dentate or crenate; lateral veins 5-8 on each side of midrib; peduncle 4-20 cm; bract 3-5 mm. |
|
(9) |
| |
|
|
|
| 9 (8) |
Corolla tube 2-2.7 mm in diam., adaxial lip ca. 5 mm, abaxial lip ca. 5.5 mm; stamens 3.5-4 mm; pistil glabrous; leaf blade base cuneate |
|
12 Isometrum primuliflorum |
| + |
Corolla tube 3-3.5 mm in diam., adaxial lip ca. 3.5 mm, abaxial lip ca. 3 mm; stamens 5-6 mm; pistil glandular puberulent; leaf blade base narrowly cuneate |
|
13 Isometrum sichuanicum |
| |
|
|
|
| 10 (5) |
Petiole to 8 cm. |
|
(11) |
| + |
Leaves sessile or petiole to 2 cm. |
|
(13) |
| |
|
|
|
| 11 (10) |
Corolla white, minutely pilose outside; leaf blade 3-4.5 cm |
|
5 Isometrum leucanthum |
| + |
Corolla pink to purple-red or pale purple to purple, glandular puberulent or sparsely glandular pubescent, sometimes only basally; leaf blade (2-)4-14 cm. |
|
(12) |
| |
|
|
|
| 12 (11) |
Petiole densely brown villous to lanate; leaf blade abaxially rust-brown villous, base narrowly cuneate to truncate; lateral veins 6-10 on each side of midrib; pedicel 1-2.2 cm; corolla 0.8-2 cm, tube narrowly urceolate, ca. 3 mm in diam., lobes 1-2 mm; stamens 4-5 mm; pistil glabrous |
|
9 Isometrum lancifolium |
| + |
Petiole densely white pubescent; leaf blade abaxially pubescent, base rounded to cordate; lateral veins 4-6 on each side of midrib; pedicel 4-7 mm; corolla 2.3-3.7 cm, tube campanulate-tubular, 7-11 mm in diam.; lobes 4-7(-11) mm; stamens 7-10 mm; pistil sparsely pubescent near apex |
|
11 Isometrum lungshengense |
| |
|
|
|
| 13 (10) |
Calyx segments 4-6 mm; leaf blade base narrowly cuneate to subtruncate |
|
7 Isometrum giraldii |
| + |
Calyx segments 2-3.5 mm; leaf blade base narrowly cuneate or cuneate. |
|
(14) |
| |
|
|
|
| 14 (13) |
Leaf blade sessile, 1.5-3.7 X 1-1.8 cm, margin irregularly dentate above middle; pistil ca. 4 mm |
|
10 Isometrum villosum |
| + |
Petiole to 2 cm; leaf blade 3-8 X 1.5-3.5 cm, margin crenate to lobulate; pistil 9-10 mm. |
|
(15) |
| |
|
|
|
| 15 (14) |
Petiole to 1 cm; leaf blade both surfaces gray pubescent, veins abaxially brown villous; lateral veins abaxially prominent; peduncle 4-17 cm; bracts 3.5-5 mm; adaxial corolla lobes ca. 2 mm, abaxial lobes ca. 4 mm; stamens 6-8.5 mm; pistil glabrous |
|
6 Isometrum farreri |
| + |
Petiole to 2 cm; leaf blade adaxially gray appressed pubescent, abaxially brown villous; lateral veins indistinct; peduncle 5.5-10 cm; bracts ca. 2.5 mm; all corolla lobes 3-5 mm; stamens 3.5-4.5 mm; pistil puberulent to subglabrous |
|
8 Isometrum crenatum |
|
|
|
List of lower taxa
| Related Links (opens in a new window) |
|
Treatments in Other Floras @ www.efloras.org
Other Databases
|
|
|
|
|
|
|
