/i98 



Ordo CCVII, ]1Iesem1>ryaiithemeae. 



Suffrutices v. rarius herhae succulentae. Folia opposlta v. 

 altcrna, carnosa, forina varia, plana, terelia sive trigona, exsti- 

 pulata. Flores perfecti, regulares, axillares, alares v. lerminales, 

 solitarii, ternati, cymoso-corymbosi v. rarissime paniculati, sole 

 fervente, interdum sub vesperam expansi, aurei, crocei, purpurei, 

 violacei, rosei v. albi. Cahjx tubo carnoso, cum germine con- 

 nalo, limbi superi, quinquepartiti, rarius bi-octopartiti lacinii^ 

 herbaceis, foliiformibus v. semiscariosis, plerumque inaequalibus, 

 aestivatione irabricalis. Corollae pctala plurima, summo calycis 

 tiibo inserta, multiseriata v. rarius uniseriata, linearia, posl an- 

 ihesim marcescentia v. gelatinose confluentia. Stainina indefinita, 

 cum petalis inserta, multiseriata; Jilamentis subulatis v. setaceis, 

 inaequilongis, liberis v. basi coalitis, antheris introrsis, bilocula- 

 ribus, ovatis, versalilibus, longitudinaliter dehiscentibus. Germen 

 inferum, carpidiis quatuor ad viginti, circa axim centralem cras- 

 sum subhorizontaliter verlicillatis quadri-vigintiloculare, carpo- 

 phyllorura marginibus suturara ventralera liberara, superam con- 

 stituentibus, valvatim connatis, v. in septura spurium plus minus 

 distincte introflexis. Trophospermia linearia, carpophyllorum 

 nervo medio adnata, fundum loculi occupantia. Gemmulae plu- 

 rimae, pluriseriatae, funiculis longis, filiformibus insertae, ara- 

 phitropae. Stigmata axim centralem terminantia, loculorum 

 nuniero, cristaeformia, crassa, v. filiforraia, aut setacea, raris- 

 sirae multipartita. Capsula primum carnosa, deinde sublignosa, 

 exsucca, apice truncato, depresso costis quafuor ad viginti ex- 

 arata, ad costas (suturas ventrales) longitudinaliter dehiscens, 

 carpidiorum a se invicera haud seccdentium epicarpio suberoso- 

 incrassato, ab apice centrali ad basira periphericam ab endocarpio 

 chartaceo v. pergaraeneo in lacinias triangulares, tempcrie hu- 

 raida erectiusculas, siccitate conniventes, soluta. Semina plurima, 

 trophospermio basilari-parietali, lineari, extreraitate peripherica 

 plerumque in tuberculum cartilagineum incrassato, funiculis in- 

 curvatis inserta, globuloso-pyriformia, integumento crustaceo, 

 opaco, laevi, granulato v. tuberculato, hilo ventrali. Alhumen 

 farinaceura, plus minus copiosura. Emhryo periphericus, dor- 

 salis, curvatus v. uncinatus, raagnus; cotyledonihus ovalibus v. 

 oblongis, obtusissimis, radicula tereti, hilo adversa, prominula. 



Genus unicitm. 



5163. Mesembryanlliemum Litin. 

 Mesemliryon Adniis. 

 Mesembryantlnis Neck. 

 Hymenogyne Uuiv. 



Affinitas*^ Wlesemljryanthemi Aaslum genus, Portulaceis Aizoideis 

 liinn affine, illiuc gernunis et tropIiosiJermiorum fabrica ad Cacteas Cucurbita- 



