100 PROCEEDINGS OF THE AMERICAN ACADEMY 



Professor of Botany at Copenhagen, and co-worker with Liebmann on 

 the Central American Flora. — Near Cartago, Costa Rica, January 1, 

 Oersted. 



115. Carex scabrella, Wahl. Kongl. Acad. Handl. xxiv. 149. 

 Aspect of a small form of C cladostachya : spikes small, often 



simple, never much compound, the lowest on long filiform peduncles, 

 sometimes radical and shorter stalked: perigynium short-beaked, 

 hairy. — Eastern Cuba, Wright 12%; Jamaica, Herb. 



116. Carex Schiedeana, Kunze, Suppl. Riedgr. 119, t. 30. 

 Cespitose : culm about a foot high, erect, three-angled, roughish, 



shorter than the convolute, slender, roughish and long-pointed leaves : 

 spikes four or five, terminal one sometimes staminate throughout, 

 more or less scattered, sessile or very nearly so, an inch or less long 

 and narrow, erect : bracts conspicuous and leafy, the lowest five or 

 six inches long, sheathless : perigynium oval or ovate-oval, round- 

 trigonous, very lightly nerved, hispid, stipitate, the beak short, straight, 

 and very lightly toothed ; scale oblong-acuminate, acute, roughish on 

 the nerves, usually a little longer than the perigynium. Affinity 

 doubtful. — South Mexico, Schiede, Ehrenberg. 



Section V. HYMEN0CHLJ5:N^, Drejer, Symb. Car. 10. 

 Perigynium mostly light green or whitish, thin and membranaceous 

 in texture, mostly somewhat inflated or at least loosely investing the 

 achenium, commonly smooth and shining and slender or oblong, 

 tapering gradually into a distinct or long minutely toothed straight 

 beak (or beakless or nearly so in the Virescentes and C. gracilUma) ; 

 pistillate spikes several or many, mostly loosely flowered and on fili- 

 form nodding or widely spreading peduncles ; bracts leaf-like ; stami- 

 nate spike usually peduncled ; stigmas three. — Mostly rather tall 

 and slender species of uplands. The perigynium is more or less hairy 

 in some of the Virescentes and in C. veimsta, one variety of C. dehi- 

 Us, C. Assiniboinensis, C. Snskatchawana., and immature specimens 

 of G. cinnamomea. The spikes in the Virescentes, G. GherokeensiSj 

 G. juncea, G. cinnamomea, and G. Ilendocinensis, are usually nearly 

 erect. I have not been able to identify G. Saskatchawana. 



A. Virescentes, Kuntli, Enum. PI. ii. 429. Terminal spike pistillate at the top; 

 pistillate spikes oblong or cylindrical, densely flowered, erect; perigynium 

 ovate or obovate, nearly or quite beakless, often hairy. 



117. Carex virescens, Muhl. ; Willd. Sp. PI. iv. 251. 

 C. costata, Schwein. An. Tab. 



C. virescens, var. elliptica, Olney, Exsicc. fasc. iii. no. 21. 



