1000 CXOI. AROIDEJE. [Orontiew. 
oligospermis. Semina oblongo-cylindracea, pendula, testa coriacea, micropyle interdum 
longissime fimbriata, albumine carnoso ; embryo axilis.— Herb:e paludosse; hroristiub, 
rhizomate repente ramoso. Folia disticha, ensiformia, basi it it 
nervosa, pedunculis foliiformibus elongatis. Spatha obsoleta v. margini pedunculi adnata, 
ultra spadicem in laminam ensiformem producta. Spadix cylindraceus, densiflorus, 
sursum florens. 
ihnainnrsd IRE 
Species ab ab Englero (4rac. 215) rite ad 2 reducte, in regio- 
nibus temperatis hemispherie borealis obvize. Schott, Gen. Aroid. t. 98. — Gerín. Fruct, ii. £. 84. 
Lam. Illustr. t. 952. Schkuhr, Handb. 1, t. 91. .Nees, Gen. Pl. Geri. Monocot, iii, ». 37... L. €. Rich. 
in Guillem. anis 1.3. Smith, Spicileg. t. YT. — Griff. Ic. Pl. Asiat. t. 162. 
98. Gymnostachys, .R. Br. Prod. 331.—Flores in spadicib is inappendieulati 
hermaphroditi, omnes fertiles. Perianthii ta 4, subquadrat data, apicibus 
fornicatis, 2 exteriora interiora obtegentia. Stamina 4, filamentis late pine compla- 
natis ; anthere terminales, -reypss loeulis connectivum superantibus ellipsoideis diver- 
gentibus rimis ext til Ovarium ovoideo-oblongum, 1-loculare ; stigma. 
subsessile, pulvinare ; ovulum orthotropum, ovoideum, funiculo brevissimo ab ppica Jona 
pendulum, micropyle infera. Bacci ellipsoid late. Semen ovoid 
- testa tenui, albumine duro copioso ; embryo axilis.—Herba tuberibus AT post 
. folium eaulem gracilem 4-gonum proferens. Folia radicalia elongata, angusta, graminea, 
longitudinaliter nervosa ; caulina brevia, carinata. Spadices apicem versus caulis, graciles, 
cylindracei, solitarii v. 24 ni, pedunculati, pedunculo basi vaginis 2-3 lanceolatis bracteato, 
floribus numerosis remotis, fructiferi nutantes. 
à Species 1, Australie orientalis ineola. — Engl. 4rac. 218. . Schott, Gen. Aroid. 0. 97... 
LÀ 
Onpo CXCIL LENINACEZ. 
Endl. Gen. Pl. 232. Hegelmeier, Die Lemnaceen, Leipzig, 1868. PrsriAcEX, partim, Lindl. Veg. 
ingd. 124. 
Flores monoici, e rimis marginalibus v. superficialibus herbul; emergentes, nudi v. spatha 
membranacea monophylla primum clausa demum rupta instructi. Perianthium 0. Fl.d: 
Stamina, 1 v. 2 ; filamenta filiformia v. medio incrassata e 0. Antherce: Jlonute v. 
2658darós ooulis bglobosi: itis rimis tibus; [ g 
Fl. 9: Ovarium séskile; 1- locilinog in stylum isteuid fundibul t tum ; Mtunb 
simplex. Ovula. 1-7, fundo ovarii TUgertay Jerem v. horizontalia, anatropa semi 
v. orthotropa. Utriculus sul v. ei i 1- -T-spermus. Semina 
erecta v. lia; testa cori , costata, op lati 3 
interiore hyalina ; Blburnes earnosum v. parcum v. 0. Embryo inclusus, axilis, rectus, 
radice supera infera v. vaga, plumula extremitati radiculari propior, rimula immersa ; 
. radieula germinatione operculum teste auferens. 
Herbuli parve v. minute, gem eie v. submerse, simplicissim:e v. rimis 
2 supra levigatz, subtus spongiosz, 
bulbillis autumno fundum, vere sup aqua magis quam seminibus multi- 
plicantes ; radices 0, v. 1—co, liberi, simplices, filiformes. " 
Species ad 20, in aquis dulcibus tam tropicis quam temperatis vigentes. 
Ordo quoad characteres fruetificationis eum Z4roideis proxime cognatus, sepeque pro harum tribu 
habitus, affinitas tamen areta Lemnacearum eum. Pistia a nonnullis ficta, nullo modo confirmatur, 
nee eum hoe. genere tur nisi cl ibus eum. omnibus 4roideis communibus. | Pistia 
revera Ambrosinice proxime accedit, dum Lemnacee, vegetatione in omnibus Monocotyledoneis singu- 
lari, loeum sibi vindicant. ordinis proprii, Aroideis stricte finitimg, etsi distinetes, - i 
