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58. Pterygiella Oliver in W. J. Hooker, Icon. Pl. 25: t. 2463. 1896.
翅茎草属 chi jing cao shu
Herbs, or shrubs, annual or perennial, erect, sometimes with long rhizomes. Stems basally woody, narrowly 4-winged or terete and wingless. Leaves opposite, decussate, sessile or subsessile; leaf blade mostly lanceolate, margin entire or serrate. Racemes terminal; bracts foliaceous. Flowers opposite, few. Pedicel short. Bracteoles 2, at pedicel apex. Calyx tube broadly campanulate, 5-veined, somewhat 2-lipped; lobes 5, 2 upper lobes shorter than other lobes, margin entire. Corolla 2-lipped, slightly longer than calyx; tube funnelform; lower lip usually nearly as long as upper, 3-lobed, lobes subequal, with 2 raised folds; upper lip 2-lobed, lobes arched, recurved at margin. Stamens didynamous; filaments inserted below middle of corolla tube; anthers 2-loculed, dorsifixed; anther locules parallel, longitudinally dehiscent, densely white villous. Ovary usually ovoid, 2-loculed, densely hirsute. Style densely villous; stigma 2-lobed. Capsule black-brown. Seeds numerous, small; seed coat scrobiculate-reticulate or seed enclosed in large bladdery loose hyaline reticulated appendage.
* Five species: endemic to China.
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| 1 |
Shrubs, ca. 100 cm tall |
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5 Pterygiella suffruticosa |
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Herbs, 14-60 cm tall. |
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(2) |
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| 2 (1) |
Leaves orbicular-ovate, margin subentire to serrate; seeds 1-1.2 mm, enclosed in a bladdery loose hyaline reticulate appendage; corolla dark brown |
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4 Pterygiella bartschioides |
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Leaves often linear, sometimes lanceolate to narrowly lanceolate, margin entire to rarely subundulate; seeds usually less than 0.5 mm, without a reticulate appendage; corolla yellow. |
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(3) |
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| 3 (2) |
Stems terete, wingless; leaves 3-veined |
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3 Pterygiella cylindrica |
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Stems quadrangular, winged along ribs; leaves 1-veined. |
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(4) |
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| 4 (3) |
Leaf blade densely glandular pubescent, apex obtuse or subacute; corolla 1.6-1.8 cm |
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1 Pterygiella nigrescens |
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Leaf blade subglabrous to sparsely pubescent, apex narrowly acute; corolla 1.4-1.6 cm |
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2 Pterygiella duclouxii |
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Lower Taxa
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