Boottia.'] CXLVI. HYDROCHARIDE^E. (J. D. Hooker.) 663 



Densely tufted ; stem with bases of leaves 1-3 in. Leaves fleshy, submerged, 

 sessile, oblong, obtuse, 12-18 by 2-3 in., green with purplish cross bands beneath, 

 midrib very stout ; upper jleaves 4-6 in. long, stout, petioled, oblong-ovate, deeply 

 cordate with overlapping rounded lobes. Male spathe 3 in. either way, ainpulli- 

 form, compressed, mouth toothed, ribs many tuberculate. Flowers ! in. diain., 

 white with yellowish tinge. 



* 8. ENH1LUS, Richard. 



A submerged marine monoa&ious or diceci&flb^.herb ; rootstock crinite 

 with the remains of old leaves. Leaves narrowly linear, enclosed in twos 

 or threes in a basal sheal^H te tf. many .used in a short 



compressed subsessile 2-]rhv^^A^^ r> 4't fil^^^^^^Blp, and floating; 

 sepals and petals broadly elliptic ; st;ni ^Ksessile, oblong; 



pistillode 0. Fern, jf*^ much, larger, solitar^^B Wa longer spathe, 



scape spiral ; sepals oolong, imbricate ; petal^^j^^Wlinear, subvalvate, 

 wrinkled, staminodes ; ovary ovoid with 6 papu^roridges, long : beaked, 

 almost 6-celled ; styles 6, bipartite, arms slender, fimbriate ; ovules few on 

 each placenta, anatropons. Fruit ovoid, beaked, indehiscent, deliquescent, 

 spathe persistent, placentas nearly meeting in the centre, spongy. Seeds 

 few, large, conoid, testa mucilaginous ; plumule many -leaved. 



E. Koenig-ii, Rink, in Mem. Institut. Fr. 1811, ii. 64; Miq. FL Ind. 

 Sat. iii. 2S7. E. acoroides, Zoll. Verz. Ind. Arcfiip. Pfl. ii. 69 ; Boiss. FL 

 Orient, v. 6; Asclierson in Nuov. Giorn. Bot. Hal. iii. 299, and in Linncea 

 xxxv. 158. Stratiotes acoroides, Linn. f. Suppl. 268. Enhalus, Griff. 

 Notul. 175 ; Ic. PL Atiat. t. 249^ 250. E. mariims, Griff. I. c. 178 ; 

 Thwaites Enum. 332. Humph. Herb. Amboin. vi. 191, t. 75, f..2. 



Shores of the Malay Peninsula, Griffith, Beccari. CEYLON, ThwaUes. DISTRIB. 

 Malay Seas, Australia. 



Rootstock extensively creeping in sand. Leaves 2-3 ft. by -|-f in., margins 

 thickened, tip rounded denticulate. Spathes 2 in. long, strigose. Ovary with pa- 

 pillose margins. Fruit raised to the surface for ripening. 



9. HAXiOPHXXiA, Thouars. 



Submerged marine plants. Leaves in pairs from the axil of a scarious 

 or hyaline scale at every node of a slender creeping stem, petioled, ovate 

 or oblong, penninerved. .Spathes of both sexes small, of 2 bracts, solitary, 

 sessile between the pairs of leaves, 1-fld. Male fl. pedicelled ; sepals 3; 

 petals ; anthers 3, alternate with the sepals, subsessile, linear-oblong, 

 extrorse ; pistillode 0. Fern. fl. sessile ; sepals 3, minute. Ovary long- 

 beaked, 1-celled ; styles 3, filiform, papillose all over; ovules 2-seriate on 

 2 parietal placentas. Fruit included, subglobose, beaked. Seeds many, 

 subglobose, testa membranous ; embryo thick with the spiral cotyledon in a 

 cavity'at the side. 



H. ovata, Gattd. in Freyc. Voy. Bot. t. 40, f. 1 ; leaves elliptic-oblong 

 or -lanceolate. H. ovalis, HooJc.f. FL Tasm. ii. 45 ; Miq. Fl. Ind. Sat. iii. 

 230 ; So-isa. FL Orient, v. 2 ; Bentli. FL Austral, vii. 182 ; Aschers. in Nuov. 

 Giorn. Bot. Ital. iii. 301, and in Linncea xxxv. 173. Barkania punctata, 

 JEhrb. Symb. Phys. Bot. in AbhandL Berl. AJcad. i. 429. Diplanthera, 

 Griff. Ic. PL As'iat. t. 161 C, f. 2. ? Thalassia stipulacea, Miq. FL Ind. 

 Bat. iii. 226 (excl. citations). Caulinia ovalis, Br. Pradr. 339. 



