Tab. 



72 



UNIOLA 



GRACILIS . 



Radice repente; culmis 



caespitosis, simplicib 



? 



strictis vaginisque compress 



glabris^foliisrigidis, planis, interne scabriusculis,- ligula pilosa; panicula longis 

 sima, spica^form* 



5 



1 



? 



libus, racemosis, 5 



stricta; ramis simplicibus, distantibus, adpressis^ spiculis subses 



floris^ floribus monandris: infimo neutro 



7^ 



Uniola gracilis Mich. Flor 

 Holcus laxus Linn. Sp. i486. 



Chasmanthium gracile Linh Hort i. p. iSo 



} 



Pursh Flor. i. p. 82 



pale 



^illd. Sp:4. p. g34 (teste Pursh.J 



Crescit in Virginia, Georgia et Carolina 



Gramen caespitosum, strictum, 18-20-pollicare; radice subborizontali , repente; fibris fili 



formibus, torto-flexuosis , glabris, fibrillis obsitis. Culmi erecti, simplices, tereti-compressi , 

 slriati, glabri, complures steriles; nodis imberbibus. Folia linearia, apice angustata, plana, sicca 

 complicata, striata, rigidula, stricta, externe glabra, Interne scabriuscula, 7-8-poIIicaria, 

 ij lineam lata. Vaginae compressae, dorso carinatae, sulcato-striataj, glabra?, nodis paulo lon- 

 giores vel breviores, 2-5-pollicares. Ligula brevis,' membranacea, pilis longis ciliata. Panicula 

 simplicissima, stricta, 6-7-poIIicaris ; ramis simplicibus, solitariis, alternis, distantibus, adpressis, 

 angulatis/ scabris, i|-2-poIlicaribus; rbachi filiformi, sulcata, glabra. Spiculce in ramis race- 

 mosae, brevissime pedicellatae , solitariae, alternae, ramo adpressa», obovatae, 5-8-florae, com- 

 pressae, 5 lineaslongae.Flores disticho-imbricati ; infimus unipaleaceus, sterilis; reliqui bipaleacei, 

 hermaphroditi ; terminalis tabescens; rhachis glabra, articulata. Glumae duae, ovatae, pbtusius- 

 culae, carinatae, herbaceae, trinerviae, margine membranaceae, viridi-purpurascentes, glabrae, 

 carina apice scabriuscula , inaecjuales, inferior minor, floribus contiguis duplo triplove brevio- 

 res. Flos sterilis glumis similisnisi major et 5-nervius. Flores hermaphroditi : Paleae duae; inferior 



viridis, margine 



membranacea et purpurascens, glabra, margine ciliolata, carina apice scabriuscula ; palea supe- 

 rior fbrevior, hyalino-membranacea , argute bicarinata, acuta; carinis membranaceo-subalatis, 

 scabris, viridibus. Smiamulae duae, laterales, subcuneato-dolabriformes, apice emarginato-bi- 

 lobae, glabrae, carnoso-membranaceae , ovario dimidio breviores. Stamen unicum, hypogynum, 

 anterius, inter squamulas (rarissime duo; unum anterius; alterum laterale ! , brevius ). Filamen- 

 tum longissimum, glabrum. Anthera oblonga, utrinqiie biloba, fusca, bilocularis, glabra (inter- 

 dum dorso subtilissime viUosa [byssis?]). Pollinis granula minutissima, subrotunda, hyalina. 

 Ovarium oblicjue oblongum, basi attenuatum, glabrum. Styli duo, terminales, elongati, glabri. 

 Stigmata plumosa, atro-violacea ; pilis simplicibus, remote et argute spinuloso-denticulatis. 

 Fructus mihi adhuc ignotus. 



o vato-oblonga , apice angustata, obtusiuscula, herbacea, carinata, 7-nervia, 



81 



