Cornus Hongkongensis Dendrobenthamia Gigantea Seeds Da Xing Si Zhao Hua
(Cornus Hongkongensis) 大型四照花
Cornus hongkongensis var gigantea Handel-Mazzetti, Symb Sin 7: 690. 1933; Benthamidia hongkongensis (Hemsley) H. Hara var gigantea (Handel-Mazzetti) H. Hara; C. gigantea (Handel-Mazzetti) Tardieu; Dendrobenthamia.. gigantea (Handel-Mazzetti) WP Fang; D. gigantea var caudata WP Fang & WK Hu;. D. pachyphylla WP Fang & WK Hu.
Shrubs or small trees, evergreen, 2-6 m tall. Old branches gray or grayish green. Leaf blade obovate, rarely broadly elliptic, 8.5-16 × 3.8-7.5 cm, leathery to thickly leathery, abaxially sparsely pubescent with appressed short trichomes when young, glabrous in age, axils of veins without or rarely with clusters of dark brown trichomes, veins often 4, conspicuous, apex caudate-acuminate Inflorescences 1.4-2 cm in diam, ca. 60-flowered;.. bracts yellowish or white, broadly obovate or nearly orbicular, ca. 4 × 3-4.2 cm, nearly glabrous. Calyx tube ca. 1.3 mm, often shallowly 4-lobed, rarely 5-lobed, outside pubescent. Petals ovate-lanceolate, ca. 4.2 × 1.1 mm ., outside sparsely pubescent Filaments ca. 4 mm;.. anthers ovoid-ellipsoid, ca. 1.2 mm Style ca. 1.5 mm, pubescent with white trichomes Compound fruit yellowish red at maturity, ca. 2.5 cm in diam .; peduncle 8- 9.5 cm. Fl. Apr-May, fr. unknown.
Evergreen broad-leaved forests, sparse forests, valleys;. 700-1700 m W Guizhou, S Sichuan, NE Yunnan [N Vietnam].
1 Leaf blade obovate, 8.5–16 × 3.8–7.5 cm, thickly leathery; inflorescences (excluding bracts) 15–20 mm in diam.; bracts broadly obovate or orbicular, 4–5 × 3–4.2 cm. 22e subsp. gigantea
+ Leaf blade ovate to narrowly elliptic, 5.5–10(–13.5) × 2.7–5.8(–6.3) cm; inflorescences (excluding bracts) 7–13 mm in diam.; bracts smaller, variously shaped. (2)
2 (1) Outer surface of petals glabrous or nearly so; style glabrous. 22b subsp. tonkinensis
+ Outer surface of petals pubescent with short appressed fine trichomes; style pubescent with white trichomes. (3)
3 (2) Lateral leaf veins, particularly secondary lateral veins, inconspicuous. 22d subsp. elegans
+ Lateral leaf veins conspicuous, secondary lateral veins conspicuous. (4)
4 (3) Abaxial surface of leaves and veins densely pubescent with reddish brown, coarse trichomes. 22f subsp. ferruginea
+ Abaxial surface of leaves sparsely pubescent with brown or brown and white thin trichomes; veins glabrous or nearly so. (5)
5 (4) Leaves subleathery, axils of abaxial leaf veins often with a cluster of Y-shaped soft trichomes, abaxial surface of leaves glabrous or rarely pubescent with brown trichomes. 22c subsp. melanotricha
+ Leaves leathery or thickly leathery, axils of abaxial leaf veins without Y-shaped trichomes, abaxial surface of leaves sparsely pubescent with brown and white appressed trichomes when young, often glabrous with conspicuous brown hair scars (brown spots) in age. 22a subsp. hongkongensis
Cornus hongkongensis subsp. elegans (W. P. Fang & Y. T. Hsieh) Q. Y. Xiang
Cornus hongkongensis subsp. ferruginea (Y. C. Wu) Q. Y. Xiang
Cornus hongkongensis subsp. gigantea (Handel-Mazzetti) Q. Y. Xiang
Cornus hongkongensis subsp. hongkongensis
Cornus hongkongensis subsp. melanotricha (Pojarkova) Q. Y. Xiang
Cornus hongkongensis subsp. tonkinensis (W. P. Fang) Q. Y. Xiang
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