e-Flora of Thailand

Volume 7 > Part 4 > Year 2002 > Page 736 > Myristicaceae > Horsfieldia

1. Horsfieldia amygdalina (Wall.) Warb.wfo-0000724810

Mon. Myrist. 310. 1897; C.Y.Wu (ed.), Fl. Yunnan. 1: 12, fig. 3: 5–6. 1977; W.J.de Wilde, Gard. Bull. Singapore 37: 177. 1984.— Myristica amygdalina Wall., Pl. Asiat. Rar. 1, 4: 79, tab. 90. 1830. Fig. 6.


Accepted Name : This is currently accepted.



Synonyms & Citations :

Horsfieldia tonkinensis H.Lecomte, Not. Syst. 1, 4: 100. 1909; Fl. Gén I.-C. 5, 2: 101. 1914.
Horsfieldia thorelii H.Lecomte, Not. Syst. 1, 4: 99. 1909; FI. Gén. I.-C.5, 2: 100. 1914; W.J.de Wilde, Gard. Bull. Singapore 37: 175, fig. 5. 1985.
Horsfieldia tonkinensis var. multiracemosa H.Lecomte, Not, Syst. 1, 4: 100. 1909; Fl. Gen. I.-C.5, 2: 102. 1914.
Myristica glabra auct. non Blume: King, Ann. Roy. Bot. Gard. (Calcutta) 3: 310, pl. 143. 1891.— Horsfieldia glabra auct, non (Blume) Warb.: J.Sinclair, Gard. Bull. Singapore 28: 35. 1975, p.p., as for most of the specimens originating from continental Asia; Y.H. Li in Fl. Reipubl. Popularis Sin. 30(2): 204, fig. 93. 1979.
Horsfieldia prunoides C.Y.Wu, Yunnan Econ. Pl. 74, fig. 56. 1973, nomen nudum.


Description : Tree 5–30 m. Twigs towards apex terete, glabrescent, at first with hairs 0.1–0.3 mm (var. amygdalina) or 0.5–1 mm long (var. lanata); bark finely striate. Leaves either in 2, 3, or 5 rows, or phyllotaxis mixed; blade membranaceous to subchartaceous, elliptic to oblong, 9–23 by 2.5, 9 cm; upper surface olivaceous brown on drying; lower surface soon glabrescent, without brown or blackish dots; midvein flat to moderately raised above; nerves 7–14 pairs, thin, flat or raised; reticulation faint; leaf bud with hairs 0.1–0.3 or 0.5–1 mm (see the variet ies). Inflorescences either thinly pubescent with pale hairs 0.1–0.2(–0.5) mm (var. amygdalina), glabrescent, or soon glabrescent, at first with hairs densely set, rusty, 0.5(–1) mm (var. lanata); in male 3–4 times branched, 4–22 by 2–12 cm, in female 1–6 cm long; flowers either 2- or 3 (or 4-)lobed, or ± an even mixture of 2- and 3-lobed, in male dispersed or in loose clusters of 4–12, glabrous. Male flowers short-obovoid or globose, 1.5–2.3 by 1.7–2(–2.2) mm; lobes splitting the bud to ca halfway; androecium (depressed-)globose or obovoid, largely solid, 0.8–2 by 0.8–1, 3 mm, subcircular to ellipsoid in section; anthers 10–15, sessile. Female flow ers ellipsoid, 2–3 by 2 mm; ovary glabrous. Fruits ellipsoid, 2–6 by 1.6–2.6 cm, glabrous, brown on drying; stalk 2–4(–5 when fresh) mm long; perianth not persisting in fruit.


Distribution : Distributed from India to Vietnam and S China (Myanmar – type).


Main
Key to the varieties
1. Leaf buds, upper portion of twigs, immature inflorescences and immature leaves with rusty woolly tomentum of hairs 0.5–1 mm long   b. subsp. Ianata
1. Hairs much shorter, 0.1–0.2 mm long  2 
2. Fruit large (3.5–) 4–6 cm long; pericarp (dry) 3–5 mm thick; seed (2–)2.5–4 cm long, with the aril thick-leathery   c. subsp. macrocarpa
2. Fruit 2–3 cm long; dry pericarp 1–3 mm thick; seed 1.5–2 cm long, with the dry aril membranous   a. subsp. amygdalina