Ri/drostachf/decG,] GXXXV. PODOSTEMACE^. 115 



L 



TkIBUS IV. HYDROSTACHYDEiE. 



21. Hydrostachys, Thou. Gen. Nov. Madag. 2. — Flares dioici, utriiisque sexus dense 

 spicati, singuli intra bracteam sessiles, perianthio squamellisve 0. Fl. ^ : Stamen 

 intra bracteam planiusculam membranaceam 1, filamento brevissimo, extrorsum antherse 

 loculos 2 majusculos distinctos ferento. Fl. $ : Ovarium intra bracteam cucullatam v. 

 cymbiformem mox induratam sessile, 1-loculare, placentis 2 parietalibus ; styli 2, fili- 

 formes, erecto-divergentea, elongati (superne longiuscule stigmatosi ?). Capsula parva, 

 ovoidea v. oblonga, in bractepe basi accreta scaphoidea reccpta, stylis emarcidis diu coro- 

 nata, 1-locularis, introrsum rima longitudinali dehiscens fere foUicularis v. denium sub-2- 

 valvis. Semina in placentis 2 parietalibus numerosa. — Caulis adnatus crassus, tuberiformis. 

 Folia elongata, e margine lateribusque caulis oriunda, basi dilatata etintus ligulata, sim- 

 plicia simpliciter pinnatifida v. bis terve pinnatisecta, rliachi prooter lobos majorea s;epe 

 lobis parvis numerosis appcndiculata. Spicse cauli adnato affixte, pedunculaty.', foliis 

 parum v. multo breviores ; bracteaj floriferse circa rhachin cc-seriatse, in spica juniore 

 dense imbricatfe, post anthesin laxiores^ semper tamen flores ct fructus obtegentes ; scapus 

 sub spica nudus v. papillis v. squamellis velatus. 



Species editse 9, forte ad 6 redncendpe, Madagascari^e et Africa? aiistro-orientalis incolae. Wcdd. 



in DC. Prod. xvii. 86. A, Juss. in Dclcss. Ic. Set. iii. t. 91 ad 94. Klotcsch inPeier$, Mossamb. Bot, 

 t52,oZ. 



Oedo CXXXVI. 



Eudl. Gen. 345. Liudl. Veg. Kingd. 287. 



Flm-es dioici. Perianthinm simplex, 4- rarius 3-partitum, scgmcntis oblongis patentibus 

 extus pubescentibus intus glandulosis 2-scriatim imbricatis a basi distinctis v. rarissime 

 in flore $ in tubmn obconicum basi connatis. Discus 0. Fl. ^ : Stamina 4-lC, filamentis 

 in columnam teretem connatis ; antlierje in capitulum connat;o, 1-seriatie v. paucie in 

 capitulo altius irregulariter insertai sub-2-seriat3e, 2-loculares, loculis parallelis contiguis 

 rima longitudinali extrorsum dehiscentibus rcctis v. flexuosis. Ovarii rudimentum 0. 

 Fl. 2 '• Staminodia 0. Ovariwn superum, ovoidcuni v. oblongum^ 4- rarius 3-gonum, basi 

 et apice truncatum v. attenuatum, rarissime ai)ice intruso 3-loDum, 4- rarius 3-loculare, 

 carpellis segmentis perianthii oppositis ; stylus 0, stigmatc discoideo 4- rarius 3-lobo, 

 lobis intcgi'is v. 2-lobis. Ovula pcrplurima, placentis parietibus septonmi affixis oo-seriatim 

 affixa, adscendentia, anatropa. Capsula coriacea, 4- rarius 3-gona, truncata v. rarissime 

 apice 3-loba, loculicide 4- rarius 3-valvis ; valvse coriacea;, medio septiferas, lobis stigmatis 

 simplicibus 2-lobisve coronatse. Semhia perplurima, septis utrinque affixa, adscendentia 

 imbricata, funiculo inconspicuOj umbilico prope basin nuclei minuti ovoidei, raphe 

 filiformi intra testae basin adscendente libera, testa membranacea siepissime utrinque 

 in caiulem capillarem producta. Embryo in axi albuminis carnosi rectus ; cotyledones 

 lineares, radicula teres, brevis, iiifera ; germinatio epigpea. 



Suffriiticcsfruticcsveglabri v. parcepilosi, vasis spiralibus ubique repleti. Caulcs pro- 

 strati V. sarmentosi et ope cirrhorum ad apices foliorum oriendorum scandentes, interdum 

 longissimi, parce ramoai, cylindracei v. obtuse 3-goni. Folia altema, exstipidata, sessilia 

 V. in petiolum alatum anguatata, plus minus ample xicanlia, nervis longitudinalibus 

 paucis parallelis margine approximatis a basi costrc s.fpius oriundis, vcnis tran.sversis 

 perplurimis per totamlongitudinem costse egrediontibus; costa validaincirrlium simplicem 

 apice in ascidiiuu operculo auctum dcsinens producto. Ascidia forma varia, ad apicem 

 cirrhi decurvi v. penduli recurvo-erecta, in foliis inferioribus SKpius ampidlacea in 



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