PODOSTEMACEARUM MONOGRAPHIA. 7i 



Lacis Ricdelii Bong. = ^pinagia Riedelii Tnl. 



Lacis pygmcca Bong. = Apinagia pygnicea Tul. 



Lacis membranaccca Bong. = ytpinngia mcmhranacea Tul. 



Lacis dislicha Cham. = Poiloslcmon Chamissois Tul. 



Lacis myriophyltoidcs D. Don. (mss. in Heib. Lambertiano nunc Lessertiano ) nil nisi 

 Mjriophjlli species est; speciniinahujusplantce, qua vidi,eChileaCumiugio suntielata. 



IV. MARATHRUM. 



Marathrvm Ilumb. et Bonpl. — HBK. — Gardn., in Calcutt. Journ. ofnat. 

 hist., vol. VII, n° xxvi, et in Flora od. allg. bot. Zeit., II Bethe, tom. VIII, 

 p. I, p. 34 (i85o). =iVon Rafinesq. (quod Seselis &p. \\detnr). = Mourjera 

 (sect. Marathrum) Endl., Gen. Pl., p. 269, n° i833. = Z/ic« (sect. Mara- 

 thrum) Chamisso, in Linn., IX, 5o4. = iic/Dre sp. Bongardo et Preslio. 



Flos nudus, androgynus, spatha s. involucro penitus clauso 

 primum conclusus, ex eodem longe tubuloso facto, breviter la- 

 cero et frequenter bilabiato , dein prodieus pedicelloque recto 

 longe exserto suffultus; peduncidus iste apice staminifero saepius 

 ampliatus et calyculiformis. Androceum perfecte verticillatum , 2- 

 seriatum, marcescens, serie externa antheris orbata. Staminodia 

 5- 10 brevissima membranacea lata, subtriangularia vel lineari- 

 acuta, libera. Stamina totidem illis alterna, Iibera;/;/(a!7ne?7fc planis 

 latis sursumacutis;a??Memoblongis obtusis integrisque, basi emar- 

 ginatis, dorso inferno affixis, introrsis, 2-Iobis, 2-rimosis; polline 

 ovoideo-trigono. Ovabicm centrale ellipsoideum, plus minus stipi- 

 tatum, 8-striatum, 2-loculare indefiniteque ovulatuni; placenta 

 axili crassa septo angusto marginata; ovulis anatropis et peritrope 

 subsessilibus. Stigmataz linearia crassa angulosa erecta, basi bre- 

 vissimecoalita, apice integra v. quasi erosa, marcescentia. Capsula 

 ovario conformis 8-nervia (nervis subsequalibus), 2-locuIaris, sep- 

 tifrage 2-valvis, valvis sequalibiis persistentibus et demum incur- 

 vis. Semina creberrima, 



HERrjE submersce, acaules, Americce tropicce indigence , rhizomate 

 crasso globoso-diffonni v. breviter expanso et dichotome partito ; foliis 



