4 
CXXXV. HYDROCHARlDEiE. 
[Ottelia. 
6-grooved. Hab. Local in ponds or ditches. Malacca, Chabong 
(Griffith). Selangor, Pudoh (Goodenough). Perak, Tambim; Larut 
(Kunstler). Province Wellesley, Krian. Penang, Telok Kumbar 
(Curtis). Lankawi, Kwah (Curtis). Kelantan near Kota Bharu. 
Distrib. India, Ceylon, Malay isles, Australia. 
5 . ENHALUS, Richard. 
A submerged marine herb, rootstock stout covered with stiff 
black fibres. Leaves strap-shaped in twos and threes in basal 
sheaths. Flowers unisexual. Males very small, white, numerous 
in a 2-leaved spathe. Sepals and petals elliptic or ovate. Female 
flower much larger, solitary in a 2-leaved spathe. Sepals 
oblong. Petals linear. Ovary ovoid long-beaked, with 6 bristly 
ridges. Fruit similar, but nearly globose. Seeds few, cone-shaped, 
green soft. Species i, Madagascar, Asia, Australia. 
(r) E. Koenigii Rich, in Mem. Institut. Fr. i8n, ii. 64; Ridl. 
Mat. i. 6. E. acoroides Zoll. Verz. Ind. Arch. ii. 69. E. marinus 
Griff. Ic. PL v 4 s. t. 249, 250. (Fig. 161, p. 3.) 
Stem woody, -25 in. through. Leaves 2 to 3 ft. long, -5 in. wide, 
tip round. Male spathes 2 lanceolate acute, olive-green bristly, 
1-5 in. long on a 2 in. long peduncle. Female spathes narrower; 
peduncle 1 to 2 ft. long. Fruit 1-5 in. long, 1 in. through, succulent 
with 6 broad bands of bristles. Hab. Common in shallow sandy 
bays all round the coast. Native name : Setul. Use : Fruit eaten 
by children. The leaves are the favourite food of the Duyong. 
The male flowers become detached and float on the surface of the sea. 
The female flower when opened is raised to the surface; after fertilisation 
the peduncle contracts spirally, so that the flower sinks below the water. 
6. HALOPHILA, Thouars. 
Submarine plants; stems slender creeping. Leaves in pairs in 
axils of a scarious bract. Flowers unisexual solitary in a double 
spathe. Male pedicelled. Sepals 3. Petals 0; anthers 3 linear- 
oblong sessile. Female nearly sessile. Ovary beaked, i-celled; 
styles 3. Fruit sub-globose. Seeds numerous, globular, minute. 
Species about 6, tropical seas. 
(1) H. ovata Gaud. Freycin. Voy. Bot. 430, t. i. 
Leaves elliptic or ovate, *25 to -5 in. long, *12 to *25 in. wide; 
petioles *5 in. long. Flowers very small; sepals ovate. Fruit 
small globose. Hab. Common in shallow sandy seas round the 
coast, Singapore, Harbour. Johor, Strait. Penang. Lankawi. 
Distrib. East Africa to the Pacific. 
Order CXXXVI. ORCHIDE.E. 
Herbs or half-shrubs, either terrestrial with a short stem, and 
herbaceous leaves, rarely climbing (Vanilla), often leafless 
