A REVIEW OF ALOCASIA (ARACEAE: COLOCASIEAE) FOR THAILAND
spathe ovoid, ca 3–4 cm long, green. Fruits globose-ellipsoid, ca 0.75 cm diam, green, ripening orange-red.
Thailand.—NORTHERN: Chiang Mai, Phrae; NORTHEASTERN: Khon Kaen; SOUTHWESTERN: Khanchanaburi.
Distribution.— NE India (Assam), Nepal, Bangladesh (Type), N Burma, N Lao PDR, N Vietnam (sight record but not confirmed), SW China (sight record not confirmed).
Ecology.— Moist areas in dry evergreen forest, sometimes on limestone & granite; altitude: 650–1175 m.
Vernacular.— None recorded. Uses.— None recorded.
Notes.— Most similar to A. longiloba but readily separable by the unlobed or barely lobed stigma, bright green leaf laminae, plain green petioles and cataphylls and in always having several leaves together. The sessile spadix and unlobed stigmas are diagnostic in Thailand.
2.Alocasia cucullata (Lour.) G.Don in R.Sweet, Hort. Brit., ed. 3: 631. 1839; Hook.f., Fl. Brit. India 6: 525. 1893.— Arum cucullatum Lour., Fl. Cochinch 2: 536. 1790.— Caladium cucullatum (Lour.) Pers., Syn. Pl. 2: 575. 1807.— Colocasia cucullata (Lour.) Schott in H.W.Schott & S.L.Endlicher, Melet. Bot.: 18. 1832.— Caladium rugosum Desf., Tabl. École Bot., ed. 3: 386. 1829.— Colocasia rugosa Kunth, Enum. Pl. 3: 41. 1841.— Caladium colocasia Schott ex Wight, Icon. Pl. Ind. Orient. 3: t. 787. 1844.— Colocasia cochleata Miq., Index Seminum (AMD) 1853. 1853.— Alocasia rugosa Schott, Oesterr. Bot. Wochenbl. 4: 410. 1854.— Panzhuyuia omeiensis Z.Y.Zhu, J. Sichuan Chinese Med. School 4(5): 50. 1985.
Small to medium sized, somewhat robust, evergreen clumping herb to 1 m. Stems erect, hypogeal, basally much-branched. Leaves many together. Petiole weakly D-shaped in cross-section, 25–30(–80) cm; petiolar sheath reaching to ca S way, margins membranous; lamina broadly ovato-cordate, 10–40 by 7–28 cm, apex acute, base shallowly cordate; primary veins 4 on each side, radiating from petiole, arching; interprimary veins not forming a collecting vein. Inflorescences rarely produced, usually solitary, sometimes paired, among the leaf bases, subtended by membranous cataphylls; peduncle 20–30 cm. Spathe 9–15 cm long, green; lower spathe 4–8 by ca 2.5 cm; limb narrowly cymbiform, 5–10 by 3–5 cm. Spadix 8–14 cm; female flower zone cylindric, 1.5–2.5 cm x 7 mm; sterile interstice 2–3 cm x 3 mm; male flower zone 3.4 cm x 8 mm, yellow; appendix narrowly conic ca 3.5 cm x 5 mm., yellowish. Fruit rarely produced, a subglobose berry, 6–8 mm diam., ripening red.
Thailand.— No specimens located, but see note below. Distribution.— NE India (Sikkim) through to Taiwan and south to Sri Lanka. Ecology.— Only found in association with human disturbance; altitude: 0–900 m. Vernacular.— None recorded.
Uses.— In China all parts are used externally for treatment of snake bites, abscesses, rheumatism and arthritis.