Thalassiec.] OLXVIIL HYDROOHARIDEJE. 455 
13. Thalassia, Scland. in Koen. et Sims, Amn. Bot. ii. 96 (Schizotheca, Ehrenb. ex 
Schweinf. Beitr. Fl. ZEthiop. 293, nomen).—Spathse unisexuales, lato-lineares, diphyllz, 
bracteis basi in tubum breviter connatis, utriusque sexus 1-flore. Flos d longe pedicellatus. 
Perianthium 1-seriatum, 3-merum ; seg ta ovata, petaloid Stamina 6, filamentis 
brevissimis; anther» longe, lereatós; lateraliter dehiscentes. Pistilli rudimentum 0. 
Flos 9 primum intra spatham caduci bsessilis, mox plus minus stipitatus. 
Ovarium longe rostratum. Perianthium . . . $fStyli . . . Fructus supra spathae 
eieatricem stipitatus, globosus, levis rugosus v. fere echinatus, ab apice in lobos 
plures breves v. demum alte fissos stellatimque patentes dehiscens. Semina co, parva, 
pulpa induta, placentis parietalibus affixa.— Plante marins submerse.  Rhizoma longe 
repens, annulatum ; caules. breves. Folia longe loriformia, basi per 2-3 vaginis longis 
membranaceo-scariosis stipata. ^ Scapi utriusque sexus e vaginis similibus parum 
prominentes. 
Species 2, altera ad oras i Indiz occidentalis, altera in Mare Rubro et Indico crescens. 
Aschers. in Neumager, Anleit. Wissensch. Beob. 361. 
14. Halophila, Thow. Gen. Nov. Madag. 2 (Barkania, Ehrenb. et Hempr. in Abhandl. 
Acad. Berl. 1832, 429). -— Bpathro "eei diphylle, bracteis a basi liberis, utriusque 
sexus l-flore. Flos d p l-seriatum, 3-merum; segmenta 
subherbacea. Anthere 3, subsessiles, eilobgo Háenrdk. segmentis alternz, extrorsum 
dehiscentes.  Pistilli rudimentum 0. Flos 9 intra spatham sessilis. Perianthii 
segmenta 3, minuta. Ovarium longe rostratum, l-loculare; styli 3, simplices, longe 
filiformes, undique minute papillosi; ovula placentis 3 parietalibus vix prominulis 2- 
seriatim affixa. Fructus spatha Bess; subglobosus, rostro ovarii exserto coronatus. 
Semina co, subglob testa Embryo crassus, apice excavatus ; cotyledon 
intra depressionem prominens, spiraliter torta, plumulam vaginans.—Herb: marins, 
submers:e, caulibus repentibus stoloniformibus ad nodos COHEN, foliatisque. Folia 
ad quemque nodum caulis v. ramuli intra sq; v. hy 
sessilem caulem amplectentem gemina, petiolata, ovalia v. oblonga, cem Spathze 
intra folia solitariz, sessiles, parve. 
Species 2 v. 3 ad costas marium Indicorum ab Africa tropica et Mare Rubro usque ad Australiam 
et Mare Pacificum australe submersm.  ailey Balf. in Trans. Bot. Soc. Edinb. xiii. 290, t. 8 ad 
116£16. Aschers. in Nuov. Giorn. Bot. Ital. ii. 300, et in Neumayer, Anleit. Wissensch. Beob. 367. 
yos Fl. Austral. vii. 182. Griff. Ic. Pl. Asiat. t. 161 C, f. 2. (Diplanthera). 
tam l quam florales ample illustravit B. Balf. in dissertatione 
foe supra citata. Auctor H. spinulosam, Benth. (Cauliniam spinulosam, Br.) rite e genere 
excludit, species est forte ad Naiadeas referenda sed floribus adhue ignotis quoad affinitates dubia 
remanet. ZH. Beccarii, Aschers., pariter a Balfourio e genere excluditur ob squamarum sub foliis 
deficientia ; folia tamen frondosa omnino Halophile et squam:e minute adesse videntur. H. Baillonii, 
Aschers., et H. Engelmanni, Aschers., species Americanze, quoad genera omnino dubi; remanent. 
Onpo CLXVIIL. BURM.AANNIACEZ. 
Endl Gen.163. Lindl. Veg. Kingd. 171. 
Flores regulares v. in Corsieis parum i i h hroditi v. rari ] 
Perianthiwm superum, corolinum, tubo supra ovarium. vario rarius obsoleto ; doit 
segmenta 6 v. 3, inter se libera; 3 exteriora viridiora, inter se sequalia, sestivatione 
valvata v. induplicata, v. in Ores posticum maximum ; 3 interiora szpius minora, nunc 
