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5. Reevesia Lindley, Quart. J. Sci. Lit. Arts, ser. 2. 2: 112. 1827.
梭罗树属 suo luo shu shu
Veeresia Monachino & Moldenke.
Trees or rarely shrubs. Leaves simple, petiolate, pulvinate or not, usually entire, glabrous to densely pubescent with stellate hairs. Inflorescences paniculate, cymose or thyrsoid, many-flowered, bracteate. Flowers bisexual, pedicellate, pedicel articulate. Calyx campanulate or obconical, irregularly 3-5-lobed. Corolla rotate; petals (4 or)5, clawed, auriculate or not, white, yellow, or pink. Stamens 15 in 5 groups of 3; filaments fused to ovary stipe to form androgynophore, upper part widening to enclose ovary; anthers sessile, usually in very congested head, 2-celled; staminodes 5, toothlike, minute. Ovary 5-locular, 5-lobed; ovules 2 per locule, ascending; stigma sessile, 5-lobed. Capsule woody, loculicidally and septicidally dehiscent into 10 separate valves. Seeds (1 or)2 per locule, superposed, winged, wing developing abaxially, membranous; endosperm reduced; cotyledons ± flat.
About 25 species: mostly in S Asia, two species in Central America (Mexico and Nicaragua); 15 species (12 endemic) in China.
Reevesia esquirolii H. Léveillé (Repert. Spec. Nov. Regni Veg. 13: 175. 1914) is a synonym of Rhododendron cavaleriei H. Léveillé in the Ericaceae (see Fl. China 14: 428. 2005).
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| 1 |
Leaf blade abaxially pubescent to tomentose |
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(2) |
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Leaf blade abaxially glabrous or pubescent only when very young |
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(8) |
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| 2 (1) |
Leaf blade orbicular, rarely ovate or obovate, almost as long as wide, to 15 cm in diam., basal veins 5 |
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(3) |
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Leaf blade not orbicular, longer than wide, basal veins 3-5 |
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(4) |
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| 3 (2) |
Leaf blade margin entire; fruit stipe nearly glabrous. |
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9 R. orbicularifolia |
| + |
Leaf blade margin with 2 or 3 teeth near apex; fruit stipe hairy. |
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10 R. rotundifolia |
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| 4 (2) |
Leaf blade abaxially densely gray stellate puberulent and usually glaucous; sepals ca. 3 mm; capsule ca. 1.5 cm. |
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11 R. glaucophylla |
| + |
Leaf blade abaxially not glaucous, yellowish brown to brown stellate pubescent; sepals 6-9 mm; capsule 2.5-5 cm (flowers not known in R. lumlingensis) |
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(5) |
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| 5 (4) |
Capsule densely brown stellate puberulent; leaf blade abaxially densely yellow-brown puberulent. |
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12 R. tomentosa |
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Capsule yellow-brown pilose or brown pubescent; leaf blade abaxially yellowish brown hairy |
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(6) |
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| 6 (5) |
Branchlets densely red-brown stellate tomentose; leaf blade midrib and lateral veins with reddish brown hairs; capsule widest ca. at middle, apex obtuse. |
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13 R. rubronervia |
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Branchlets brown or yellowish brown pubescent or puberulent when young; leaf blade midrib and lateral veins with brown or yellowish brown hairs; capsule widest above middle, apex truncate |
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(7) |
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| 7 (6) |
Capsule 2.5-3.5(-5) cm; leaf blade 7-19 cm. |
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14 R. pubescens |
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Capsule 4.5-5 cm; leaf blade 13-18 cm. |
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15 R. lumlingensis |
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| 8 (1) |
Young branchlets densely yellowish stellate puberulent, yellowish white when dry |
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(9) |
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Young branchlets glabrous or very sparsely pilose, gray or purple-black or blackish brown when dry |
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(10) |
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| 9 (8) |
Leaf blade 10-15 × 3.5-5.5 cm, base unequally cuneate; capsule ca. 4 cm. |
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2 R. lofouensis |
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Leaf blade 2.5-10 × 0.8-4 cm, base rounded, shallowly cordate or shortly cuneate; capsule ca. 3 cm. |
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3 R. formosana |
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| 10 (8) |
Petiole 5-6.5 cm; leaf blade 4-8(-10) cm wide. |
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14 R. pubescens |
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Petiole 1-3.5 cm; leaf blade 1.5-6 cm wide |
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(11) |
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| 11 (10) |
Leaf blade oblanceolate, to 20 cm, apex obtuse or rounded. |
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1 R. botingensis |
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Leaf blade elliptic, ovate-elliptic, or lanceolate, less than 15 cm, apex acute or acuminate, less than 15 cm |
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(12) |
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| 12 (11) |
Petals thick, sparsely pilose; inflorescences to 12 cm. |
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4 R. shangszeensis |
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Petals thin, glabrous; inflorescences to 10 cm |
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(13) |
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| 13 (12) |
Calyx 8-9 mm; leaf blade 3-6 cm wide, lateral veins 8-12 on each side of midrib; capsule 4-4.5 cm. |
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8 R. longipetiolata |
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Calyx 3-6 mm; leaf blade 1.5-3 cm wide, lateral veins 5-7 on each side of midrib; capsule 1.5-4 cm |
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(14) |
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| 14 (13) |
Leaf blade lanceolate or oblong-lanceolate, base acute; capsule with white scurfy scales; androgynophore ca. 2.5 cm. |
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5 R. lancifolia |
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Leaf blade elliptic, ovate-elliptic, or elliptic-lanceolate, base rounded or obtuse, rarely subcordate; capsule with yellow to brown stellate hairs; androgynophore 1-2 cm |
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(15) |
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| 15 (14) |
Sepals ca. 3 mm; petals yellowish; leaf blade thinly papery; capsule 1.5-2 cm. |
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6 R. pycnantha |
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Sepals ca. 6 mm; petals white; leaf blade leathery; capsule ca. 3 cm. |
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7 R. thyrsoidea |
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List of lower taxa
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