4, 
MONOCOTYLEDONES. 
Onpo CLXVII. HYTDROCHARIDEZ. 
Endl. Gen. 160, Lindl. Veg. Kingd. 141. 
Flores regulares, unisexuales v. rarius hermaphroditi, intra spatham tubulosam 
2-fidam v. 2-partitam v. bracteas 2 complicatas (spatham dyphyllam dictas) solitarii v. masculi 
plures, Perianthiwm ad apicem pedicelli in flore d, supra ovarii rostrum in flore $ v. 9, 
patens, a basi partitum, segmentis 1- y. 2-seriatis in quaque serie 3 rarius 2; exteriora 
calycina, sepius tenuiter membranacea, virentia v. subcolorata, valvata v. induplicata ; 
interiora dum adsint plus minus petaloidea, exterioribus majora minora v. rarius zequalia. 
Stamina in flore d v. t 3, 6, 9, v. 12, rarius co v. abortu pauciora, filamentis sepius bre- 
vibus distinctis. Antherz erectze v. adnato, lineares oblongo ovate v. rarius subgloboss, 
2.locul , loculis distinctis parallelis, a latere 1 gitudinaliter dehi, tibus ; staminodi 
nonnulla in flore 9 sepe adsunt. varii rudimentum in flore d interdum in centro 
foris breve carnosulum pulvinatum v. lobatum v. stylis 3 capillaribus nudis coronatum. 
Ovariwm foris 9 v. b inferum, l-loculare, placentis 3-6 rarius paucioribus v. pluribus 
nunc vix prominulis nunc 2-lamellatis in medio cavitatis conniventibus ovarium in loculos 
, 9-6 subperfectos dividentibus, supra loculum plus minus in rostrum farctum (rarius 
cavum?) productum.  Sfylws a basi integra rarius breviter evoluta in ramos stigmatosos 
v. stigmata tot quot placente oblonga v. linearia integra emarginata 2-fida v. 2-partita 
divisus. Ovula in quaque placenta plurima, swpius numerosa, nune supra faciem inte- 
riorem lamellarum placentze sparsa, nunc in placenta tenui sub-2-seriatim superposita, 
pendula y. presertim inferiora ascendentia anatropa, v. (ex Caspary) interdum orthotropa. 
Fructus globosus ovoideus oblongus v. linearis, siccus v. plus minus pulposus, maturitate 
irregulariter ruptus v. hinc fissus, 1-locularis v. placentis medio coalescentibus 6—2c-locu- 
laris; pericarpium b v. rarius iuscul Semina oo, ssepe numerosa, 
oblonga, testa (an semper ?) duplici, ssepius membranacea extus plus minus pulpa siccitate 
spongiosa v. filamentosa involuta, v. rarius crustacea demum indurata echinataque. 
Albumen 0. Embryo semini conformis, extus lzvis v. in longitudinem tenuiter lineatus, 
ante maturitatem in ib libus specie homog et siccitate interdum 
farinosus, bene maturus ubi notus a latere fissura. parum conspicua notatus, intra 
quam plumula minima omnino recondita ; in Thalassieis (omnibus ?) cotyledon extra radi- 
culam crassam prominens. a : 
Herb: submerse. Caules nunc ad basin aquse brevissimi v. reptantes v. in aqua 
natantes stoloniformes, nunc in aqua elongati undique foliati. Folia nunc in caule brevi 
conferta, omnia sessilia linearia v. lanceolata v. interiora cujusve fasciculi rarius omnia 
petiolata lamina expansa supra aquam natante, nunc secus caulem elongatum submersum 
brevia, verticillata v. sparsa. Spath:» nunc Q v. omnes in scapo elongato per anthesin 
emerszs, nunc d' v. omnes ad axillas foliorum sessiles, solitarim v. rarius gemins ; uni- 
sexuales variant monoic:e v. dioicze. 
Species note vix 40; Glyeydre per regiones calidiores temperatasque utriusque orbis late 
disperse, quarum genera 2 Ameri. ecetera gea, ex his species 2 sol» etiam in America 
