STIPEAE PLAIENSES 119 



la fusca V. subatra non v. obsoleiissime (sub lentc validissima ad 

 naturitatom) scabriuscula ubique et semper adpresse albo-pilosa, su- 

 perne brevissimc angustata v. rotundata, deorsum sensim attenuato- 

 subturbinata, glumella supera pusiila (0,5-0,75 mm long.) anguste 

 lanceolata byalina enervi glabra, antbopodio pusilio obconoideo 

 (0,20-0,30 mm long.) dense adpresscque albo-villoso. 



Arista tenuis facillime, ad naturiiatem praecipue, caduca (5-15 

 mm long.) pallida v. purpui-ascens, nuda, scaberula, 2-geniculata, 

 geniculo supero ad mcdium v. parum infra, infero ad quartum po- 

 sticum. Articulatio glumeliac cum arista eximia sed in forvola calli 

 coronarii abscondita. 



Corona, quandoque absolutc nulla, glumella apice obliqua obtu- 

 sissima vix calloso-pallescente umbilicatula, quandoque evoluta pu- 

 silla conoidea et cum glumella .continua v. cylindraceo-annulifor- 

 mis pallida glabra non v. saepe pilis glumellae, ipsam superanti- 

 bus plus minusve abscondita. 



Species pulchella sed valde varibilis; varietates nobiliores di- 

 stinguendae sunt: 



a) typlca Speg.: culmis folia breviter superantibus, foliis dense 

 fasciculato-caespitosis convoluto-setaceis glabris, subrigidulis atque 

 sub glaucescentibus, intiorescentia brevis angusta, spiculis confertis, 

 glumis plus minusve purpureo-tinctis (4 mm long.), flosculis ob- 

 clavatulis superne obtusissimis obliquis umbilicatis callosis (2,75 

 mm long.=0,75 mm diam.), aristis ;5-8 mm long.i brevibus. 



b) subtypica Speg.: culmis et foliis, margine ciliolatis, flaccidulis 

 viridibus ut in var. typica; paniculis elongatis saepius angustissime 

 liaearibus valde depauperatis, spiculis rcmotis, glumis saepius atro- 

 purpureis (5 mm long.), flosculis e terete fusoideis, apice eximie 

 minuteque annulato-coronulatis (4 mm long. = 0,50 mm diam.); ari- 

 stis (5-10 mm long.) brevibus. 



c) elata Speg.: culmis folia omnia convoluto-subsetacea, ut in 

 typo, longissime superantibus; paniculis elongatis depauperatis, ra- 



