742 OLXXVI. DIOSCOREACEJE, 
patentibus. Stamina fundo perianthii affixa, nune 6 omnia perfecta, v. alterna (lobis 
interioribus opposita) ad staminodia varie reducta, nunc 3, alternis omnino deficientibus ; 
filamenta. nune brevissima nune perianthio vix breviora, libera v. in centro floris in 
columnam brevissimam quus , apice recurva v. ineurva. .Anfhere parve, nunc sub- 
globos:e loculis distinctis at llelis, nune didym:e loculis ad connectivi apices 
filiformes (ramos filamenti) separatis. Ovarii rudimentum nune crassum columnare 
— 3-fidum, nune parvum depressum pulvinatum, V. Stepe omnino deficiens, Fl. 9: 
ianthium, 6-fidum v. 6-partit quam in mare sepius minus, persistens. Staminodia 
nbn; 3-6 sepius adsunt, Ovarium inferum, lineare v. oblongum, BEEN 3- ootkiNe 
Styli. 3, brevissimi, distincti v. in columnam brevem coaliti, stig 3 ter ib 
iniegit v. 2-fidis supra stylum recurvis. Ovula in quoque loculo 2, superposita, angulo 
centrali sub apice lateraliter affixa, pendula, anatropa v. fere amphitropa. Fructus capsu- 
laris, 3-valvis, v. baccatus indehi Semina pl. p v. globosa, testa appressa. 
Albumen carnosum fere cartilagi: Embryo albumine inclusus, parvus, ab hilo parum 
remotus. Flores . generum abnormium in diversis generibus diversi. 
Rhizoma in generibus normalibus tuberosum, carnosum crassum nunc maximum, hypo- 
geum v. demum pum et fere lignosum. Caules tenues, volubiles, alte scandentes, 
v. rarius abb bent Folia alterna v. interdum fere omnia opposita, 
petiolata, sepe Gordata  digitato-3-oo- -nervia et reticulato-venulosa, integra basi lobata v. 
in ta 3-20 p digitatim divisa, petioloi ima basi sepissime. torto interd 
artieulato, nunquam cirrifero. Flores parvi, spicati v. racemosi, sessiles v. varie pedi- 
cellati, , bracteis parvis sepe minutis v. 0. Racemi d' nunc simplices abbreviati v. 
1. 
nunc i amosi, 9 simpli elongati v. abbreviati, rarius ad flores 
1-2 reduci. Habitus eti ia generum ab valde varia. 
Species ultra 160, per regiones calidiores utriusque orbis late disperse, plures etiam in America 
boreali et australi extratropica et in Africa australi, 2 sole in Europa obvis. 
Ordo quoad genera normalia facile distinetus, S;nilaceis pluribus notis accedens, sed ovario infero 
ovulis anatropis embryone etc. bene separatus. Genera abnormia hue addantur ob characteres potius 
Jioscoreaceis quam ullum alium ordinem referentes, 
CONSPECTUS GENERUM. 
* Genera, normalia, floribus unisexualibus dioicis v. rarius sonoicis. Fl. d in omnibus consimiles, 
3—-6-andri. 
m 
Semina eom- 
1l, Dioscomra. Capsula a latere 3-loba, lobis planatis fere al. 
planata, deorsum v. cireumcirca alata, rarius exalata.— 4rea. Zofa, ordinis. 
2, TesrupDrNARIA. Capsula Dioscoree. Semina sursum alata, samaroid ea, Rhizoma epigeum 
maximum, lignosum.— Afr. austr. 
3. RazaN1A. Capsula abortu monocarpica, complanata, sursum alata, samaroidea.— Znd. 
occid. 
4. Tawis. Bacca globosa, indehiscens. Semen globosum, exálatum, embryone minimo.— 
Eur., Asia temp., Afr. bor., ins. Canar. 
** Genera abnormia, floribus hermaphroditis 6-meris 6-andris. 
5. SreNowERIS. Caulisvolubilis, Paniculw axillares, breves, laxw. Perianthii lobi setaceo- 
acuminati, Ovarium 3-loculare, loculis multiovulatis.—Zns. Philippin. 
6. TmrcHoPUs. Caulis brevis, simplex, apice folium unieum et pedicellorum fascieulum 
ferens, Ovarium 3-loculare, loculis 2-ovulatis. Capsula indehiscens.—Znd. or. 
7. Oxcus. Caulis alte scandens, Spica longa, laxa, subterminalis. Bacca oblonga, 3-loeu- 
laris, polysperma.— Cochinchina, 
8. PrERMANNIA. Caulisalte seandens. Racemi v. cymulee axillares, pauciflori, Ovarium 
1-loculare, placentis 3 parietalibus co-ovulatis.—Australia. 
1. Dioscorea, Linn. Gen. ». 1192, —Flores unisexuales, dioici v. in distinctis racemis 
ejusdem rami monoici Fl. 4 : Perianthium formas omnes in charactere ordinis 
enumeratas preebeé, Stamina nune 6 in centro floris conferta v. in columnam brevem 
