Loài Acalypha wilkesiana (Họ Thầu dầu)

Mô tả Hình thái học & Nhận diện

DESCRIPTION Shrubs or small trees, probably evergreen, to 4 m tall, monoecious. Branches usually tomentose to substrigose, sometimes also hispid, glabrescent when mature. Axillary buds naked, hispid with simple, erect trichomes. Stipules to 7 (- 10) mm long, linear-lanceolate or filiform, sometimes broadened at base, appressed-pubescent. Petioles 1 - 4 (- 8) cm long, tomentose. Leaf blades usually variegated green, red, yellow, purple, or copper, 8 - 20 × 3 - 10 (- 13) cm, usually broadly ovate-lanceolate, sometimes elliptic or obovate-lanceolate, membranous; base broadly cuneate, obtuse, or rounded, sometimes decurrent; apex acuminate, sometimes abruptly so, acumen to 40 mm long, obtuse, mucronate; margin serrate to crenate-serrate, teeth obtuse, irregular; upper and lower surfaces subglabrous, appressed-pubescent on veins; venation actinodromous, basal veins 3 or 5, secondary veins 7 - 9 per side. Stipels absent. Inflorescences spiciform, unisexual, axillary. Male inflorescences to 25 cm long; peduncle to 15 mm long, velutinous; flowers glomerate; bracts to 1 mm long, elliptic, sparsely hairy. Female inflorescences to 10 cm long, densely flowered; peduncle to 40 mm long, pubescent with simple, curved trichomes; bracts to 16, sessile, enlarging in fruit to 9 × 11 mm, sparsely hairy; margin deeply dentate, teeth c. 15, to 1 / 2 bract length, triangular-lanceolate, central tooth prominent; bracteoles absent. Male flowers: pedicel to 1 mm long, sparsely hairy; buds to 1 mm diameter, sparsely hairy. Female flowers 1 per bract, sessile; sepals 3, to 1 mm long, elliptic-lanceolate, puberulent; ovary c. 1.3 mm diameter, 3 - lobed, smooth, surface densely pubescent; styles 3, to 7 mm long, distinct, glabrous, each divided into 8 - 10 segments. Allomorphic flowers not seen. Capsules to 5 mm diameter, verrucose, surface densely pubescent. Seeds c. 2 mm diameter, globose, minutely foveolate.