OP ARTS AND SCIENCES. Ill 



B. Extensoe, Fries, Corp. 188. (Tuckerman, Enum. Meth. 13. Flavoe, Tucker- 

 man, 1. c.) Spikes mostly approximated or aggregated at the top of the 

 culm (becoming remote in C. extensa), the lowest one or two subtended by a 

 long and leafy mostly abruptly spreading and nearly or entirely sheathless 

 bract. 



148. Carex extensa, Goodenough, Linn. Trans, ii. 175. 



Coast of Long Island and Coney Island, New York, Herb,; Nor- 

 folk, Virginia, McMinn. Introduced from Europe. 



149. Carex flava, Linn. Sp. PI. 975. 



C. lepidocarpa, Tausch. Flora, 1834, 179. 



Forms lepidocarpa and androgyna^ Olney, Exsicc. fasc. iii. nos. 

 26 and 27. 

 Newfoundland, La Pylaie, etc., to New England and Ohio, and 

 northward to Carlton House, British America ; Hudson's Bay Creek, 

 Montana, Canhy. Europe. 



150. Carex (Ederi, Retz in Ehrh. Calam. Exsicc. no. 79. 

 C. flava, var. (Ederi, Willd. Act. Berol. 1794, 44, t. 1. 

 C. viridula, Michx. Fl. Bor.-Ara. ii. 170. 



C flava, var. lutescens, Wahl. Fl. Lapp. 234. 

 Bears the name of Georg Christian (Eder, 1728-91, a Danish, 

 botanist. — Newfoundland, La Pylaie, to Pennsylvania and Illinois, 

 and northward to the Great Plains, Macoun, and Rocky Mts., Drum- 

 mond, of British America ; S. Utah, Parry. Europe. 



151. Carex Urbani, Boeckeler, Engler's Bot. Jahrb. vii. 280. 



" Bright green : culm (not fully mature) three to four inches high, 

 smooth, many-leaved at the base : leaves rigid, herbaceous, crowded, 

 subrecurved and spreading, an inch and a half to four inches long, 

 short-acuminate, many-nerved, the margins slightly dentate, one line 

 broad : sheaths membranaceous, whitish, truncate : spikes four, more 

 or less approximate, greenish white, the staminate oblong-linear (seven 

 lines long and a line and a half broad), with the bi*act scale-like and 

 cuspidate and the keel ciliate, the pistillate (not mature) peduncled, 

 oblong-oval, obtuse, densely flowered (five to six lines long, three lines 

 broad) : bracts all elongated and sheathing (two to four inches long) : 

 scales large, membranaceous, ovate- or oblong-sublanceolate, obtuse, 

 muticous, three-nerved and green on the broad back, setulose or 

 glabrous, the sides white-hyaline and very slightly reticulated: peri- 

 gynium (immature) bright green, about the length of the scale, scarcely 

 erect, slightly incurved, turgid, oblong-oval, contracted at the base, 

 costate-nervose, gradually produced into a rather long subglabrous 

 toothed beak." — Alaska, Krause. 



