Abstammung und Heimat der Negerbirse. 



55 



kteralibiis saepius l-floris, omnibus quoad fiorem superiorem 

 liennaphroditis, glabris vel apicem versus scabridis vel bic 

 plus minusve longe pilosis, 4—6 mm longis; gluma I. abor- 

 tiva vel evoluta tunc minima, squamiformi, late rotimdata 

 vel rarius anguste rotundata, margine saepe crenata, avenia 

 vel rarissime rudimentarie 1(— 3)-nervia; glama IL raro 

 minutissima saepe priorem subduplo superante eaeque 

 isomorpba, l-nervia, vel majore spieulam usque ad \'-2 

 aequante, apice rotundata et 3 — 5-nervia; gluma IIL raro 

 minutissima sueto in spieulia 1-floris spieulam plus minusve 

 ad 1/2 aequante, in 2-fioris quam palea sequcns paullo 

 breviore, e late lineari-elliptico truncata vel breviter tridenta 

 3— 5— 7-nervia; palea floris 3 si adest glumam IIL subae- 

 quante ; palea floris 5 inferiore glumae praecedenti isomorpba 

 sed magis mucromüata, 5 — 7-nervia paleam superiorem 

 latissime emerginato-rotundatam medioque plus 

 manifeste 2-dentatam paullo superante; antberis valde pcni- 

 cillatis; Stigmatibus ad ^ji—^^ß longit. conuatis, purpureis, c 



spiculae apice porrectis. 



Est species collectiva ex origine polypbyletico mempe 

 e Venniseto gymnothrix , F. TerroUettn, P. moUisslmo, P. 

 violaceo et F. vcrskolorc in cultura orta, eujus formas, post 

 Studium perenne maximeque iutensnm ex cbaraeteribus im- 

 primisque babitu in ordinem sequeutem redigo. 



minusve 



A. Formae ad Pennisetum gymnothrlx 



(AL IJr.) K. Sclmm. trausemiles. 



Omnes setis permultis exterioribus scabris, intimis per- 

 paueis paupereque pennatis insigncs. 



Forma 1. socia (AL Br.) Dur! et Scbinz. — Fenicülaria 

 socia AL Br. et Bebe! Ind. sem, bort. BeroL 1855, App. 24; 

 C. MuelL in Walp. Ann. bot. VI (1861) 964; Sebweinf. Beitr. 

 FLAetbiup. (1867) 361. — Fennisetum spkatum y^w socium 

 Dur. et Sebinz, Consp. FL Afr. V (1895) 785. 



Gravissiniis momentis, imprimis palearum forma optimc 

 longeque acuminata (nee! ut in sequentibus im.posite mucro- 

 nata), setis 1 — 2 intimis tantum pennatis, toto babitu 



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