CAREX. 



CYPERACEAE. 701 



striata angustaio -acuminatn , margine ct costa media sursum scaberrima , basi vagi- 

 nantia , vaginae transverse rugoso - plicatae. Spicne 5 lineari - cylindricae remotae , 2 

 superiores abbreviatae masculae obtusne, 3 inferiores androgynae acutae. Spicae 

 androgynae pedunculatac muliitlorae densiflorae, apice masculae, basi foemineae, bra- 

 ct<-a sua foliacea breviores, infima subraclicalis longissime, reliquae brevissime pedun- 

 cuiatae. Squamae foomineae e basi ovata albo-hyalina lanceolatae, nervo excurrente 

 cuspidato - aristaiae fructu longiores. Stigmata duo elongata. Ovaria rhombeo- 

 obovalo - oblonga glabra , fauce bidentata. Utriculi . . . . ? Sqnamae masculae anguste 

 oblongae membranaceae fuscae obtusae, apice plerumqne albido -scariosae , nervo 

 apice evanido. Spicae 2 superiores masculae sessiles, inferior bractea scariosa nervo 

 viricTi excurrente longe aristata, spica sua breviori suffulta , summa bractea scariosa 

 parva setacea suffulta. Squamae anguste oblongae albidae membranaceae, nervo 

 viridi excurrente brevissime mucronatae vel nervo apice evanido obtusae. — Ex 

 affinitate C. caespitosae L. — Crescit prope JNeubraunfels in terra Texana. 



15. C. TETRASTACHYA Scheele, Linnaea XXII. 347. + — Radix fibrosa caespitosa. 

 Culmus erectus triqueter glaber scaber pedalis foliosus. Folia basi vaginantia ac- 

 crescentia plana carinata glaucescentia longe attenualo -acuminatagglabra, margine 

 scabriuscula, summa culmum subexcedentia. Spica composita, spicnlae 4 androgynae 

 alternae approximatae subrotundo-ellipticae obtusae, basi cuneatae, inferne masculae. 

 Bractea inflma herbacea setacea spicam corapositam aequans vel superans, mediae 

 e basi brevi ovata membranacea in setam elongatam herbaceam spiculani acquantem 

 eademve longiorem desineuies, bractea summa spicula brevior. Squamae oblongo- 

 lanceolatae hyalino -albidae uninerves cuspidatae vel nervo viridi excurrenle aristatae. 

 Siigmata duo. Utriculi ....'.' — Ex aftinitate C. ovalis Good. — Crescit in Texade 

 prope iSeubraunfels. 



16. C. PIi\ETORUM Liebm. Mexicos Halvgraes pag. 75. f — Rhizomate horizontali repenle 

 flexuoso rigido; culmis 3— 5- pollicaribus flexuosis incurvatis triquelris slriatis gla- 

 bris, basi foliatis ; foliis culmo brevioribus anguste linearibus rigidis carinatis glabris, 

 vaginis brevibus stramineis; spica composita terminali Va— 2 A poll. longa e spiculis 

 3 — 5 ovatis approximatis subdistichis alternis androgynis basi masculis congesta ; 

 bractea fusca e basi Ialiore setaceo-subulata ; squamis masculis oblongis obtusis cari- 

 natis basi 3-nerviis dilute fuscis. margine subhyalinis; staminibus 3; squamis foem. 

 ovato -lanceolaiis carinatis uninerviis obscurius fuscis; perigynio squamam parum 

 superante ovato - elliptico plano-convexo rostrato, superne marginato-alato, alis viri- 

 dibus membranaceis ciliolato - scabris, dorso convexo fusco lcviter striato , rostro 

 bidentato ; caryopsi perigynio duplo breviore ovata plano - convexa , utrinque abrupte 

 attenuata laevi nitida fusca; slylo longitudinem roslri aequante, stigmatibus exserlis 2 

 fuscis. — Ex affinilale C. arenariae L. & C. Schreberi W. — Habitat in Mexico 

 (Orizaba). 



17. C. ORIZARAE Liebm. I. cit. + — Culmo 7 — 5-pollicari striclo erecto trigono striato, 

 angulis scabris, basi foliato ; foliis culmo brevioribus 2" lalis planis carinatis pallidc 

 flavo- viridibus , carina margiueque subtiliter scabris, vaginis fusco - stramineis, ore 

 membranaceo truncato ; spica composiia Vo— 2 A poll. longa, e spiculis 6 — 9 ovatis in 

 capitulum subovalum lobatum congcsia, basi bracleis 2 subulatis scabris spica brevio- 

 ribus suffultis ; spiculis androgynis, basi masculis; squamis masc. ct focm. similibus 

 lanceolatis acutis uninerviis fuscis ; staminibus 3, filamentis squama longiorih'us, an- 

 theris linearibus acutis apice denticulatis dilute. flavidis; perigynio squama longiore 

 ovato elliptico plano-convexo nervoso rostrato marginato-alato fusco, alis membrnna- 

 ceis ciliolato-scabris, rostro apice obsolete bidentalo; caryopsi perigynio muliominorc 

 late elliptica lenticulari-compressa apicaia laevissima nitida fusca ; stylo longo vix acl 

 medium flsso sursum incrassato; stigmalibus 2 exsertis fuscis. — Affinis C. festivae 

 Dew. — Habitat in Mexico (Orizaba). 



