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2. Staurogyne Wallich, Pl. Asiat. Rar. 2: 80. 1831.
叉柱花属 cha zhu hua shu
Authors: Jia-qi Hu & Thomas F. Daniel
Ebermaiera Nees.
Annual or perennial herbs or small shrubs, without cystoliths. Stems very short or elongate. Leaves in a basal rosette or cauline, opposite (or alternate, especially apically), petiolate or sessile; leaf blade margin entire or nearly so. Inflorescences terminal or axillary, racemes or spikes; bracts opposite or alternate, leaflike or usually well differentiated from leaves; bracteoles present. Calyx 5-lobed almost to base; lobes equal or unequal. Corolla tube cylindric or basally cylindric and apically expanding into a campanulate throat; limb subactinomorphic to 2-lipped, 5-lobed; lobes subequal, patent, descending cochlear in bud. Stamens 4, didynamous, included or anterior pair slightly exserted; filaments usually hairy; anthers 2-thecous; thecae parallel, usually equal; staminode 1 or more, sometimes absent. Ovary with usually 12-60 ovules arranged in 2 or 4 rows per locule; style glabrous; stigmas 2-lobed, sometimes repeatedly 2-lobed. Capsule oblong, many seeded; retinacula absent. Seeds minute, subspherical or cuboid.
About 140 species: tropical regions worldwide; 17 species (eight endemic) in China.
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| 1 |
Bracts pinnately veined |
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(2) |
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Bracts not pinnately veined |
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(3) |
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| 2 (1) |
Plants to 20 cm tall; leaf blade 2.5-6 × 1-2 cm; spikes ca. 1 cm. |
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7 S. paotingensis |
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Plants to 1 m tall; leaf blade 13-17 × 4.5-7 cm; racemes to 15 cm. |
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8 S. rivularis |
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| 3 (1) |
Leaf blade base cordate. |
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5 S. chapaensis |
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Leaf blade base cuneate, rounded, or attenuate |
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(4) |
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| 4 (3) |
Stems very short; leaves forming a basal rosette |
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(5) |
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Stems elongate; leaves cauline |
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(7) |
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| 5 (4) |
Leaf blade oblanceolate, widest above middle. |
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10 S. concinnula |
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Leaf blade ovate-oblong, elliptic, oblong, ovate, or oblong-obovate, widest below middle |
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(6) |
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| 6 (5) |
Leaf blade adaxially villous; corolla ca. 2 cm. |
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6 S. sinica |
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Leaf blade adaxially strigose; corolla ca. 5.5 mm. |
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12 S. strigosa |
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| 7 (4) |
Calyx 1.8-2.4 cm; corolla 3-4 cm. |
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4 S. sesamoides |
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Calyx less than 1.5 cm; corolla less than 2.5 cm (corollas unknown in S. sichuanica and S. yunnanensis) |
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(8) |
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| 8 (7) |
Leaf blade linear, 5-9 mm wide, length/width greater than 5. |
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13 S. stenophylla |
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Leaf blade lanceolate, ovate-lanceolate, oblong, or elliptic, usually broader than 1 cm, length/width less than 3 |
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(9) |
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| 9 (8) |
Calyx lobes spatulate. |
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15 S. petelotii |
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Calyx lobes linear, lanceolate, or triangular |
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(10) |
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| 10 (9) |
Longer pair of stamens slightly exserted. |
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1 S. hypoleuca |
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Stamens all included |
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(11) |
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| 11 (10) |
Inflorescences all borne on axillary brachyblasts. |
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2 S. longicuneata |
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Inflorescences not all borne on axillary brachyblasts |
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(12) |
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| 12 (11) |
Inflorescences terminal only; calyx lobes unequal |
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(13) |
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Inflorescences terminal and axillary; calyx lobes subequal or equal |
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(14) |
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| 13 (12) |
Bracts adaxially densely pubescent. |
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14 S. yunnanensis |
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Bracts glabrous or subglabrous. |
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16 S. vicina |
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| 14 (12) |
Stems suberect or ascending from a decumbent base. |
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17 S. debilis |
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Stems erect |
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(15) |
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| 15 (14) |
Filaments glabrous. |
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11 S. hainanensis |
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Filaments pubescent |
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(16) |
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| 16 (15) |
Peduncles, rachises, and pedicels puberulent. |
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3 S. sichuanica |
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Peduncles, rachises, and pedicels glabrous. |
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9 S. brachystachya |
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List of lower taxa
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