80 PROCEEDINGS OF THE AMERICAN ACADEMY 



9. C. STLVATiCA, DC. Panicle contracted ; glumes ovate-lanceolate, 

 sharply acuminate, about 3 lines long ; hairs only one fourth of the 

 leno-th of the flower, but the plumose elongated rudiment with its hairs 

 reaching to or much above the middle of the flower ; awn suprabasilar, 

 twisted, exceeding the palea and the glumes. — Arctic coast (Cpurpii- 

 rascens, R. Br.), Saskatchawan (a specimen in Bourgeau'a collection 

 has the second flower sometimes imperfectly, sometimes perfectly 

 formed), &c., and Rocky Mountains. 



10. C. PiCKERiNGii, Gray, Man. ed. 2. (C. sylvatica, var. hreviseta, 

 ed. 1.) Panicle pyramidal, contracted after flowering, purplish ; glumes 

 ovate-oblong, obtusish or obtusely somewhat pointed, 2 lines or less in 

 leno-th ; hairs, both those at the base of the flower and of the short rudi- 

 ment, scanty and very short, only one fourth or fifth the length of the 

 very obtuse lower palea, which bears half-way between the middle and 

 the base a stout and straight or bent (but not twisted) awn not surpass- 

 ing the flower. — White Mountains of New Hampshire, in the alpine 

 region, Aug. - Sept. A luxuriant and smaller-flowered variety of this 

 was gathered far below the alpine region, at Echo Lake, Franconia, 

 by Wra. Boott, Esq. ; its spikelets only a line and a half long. Hairs 

 wanting at the base of the back of the lower palea, as in allied spe- 

 cies. Rudiment always less than half, and often only a quarter of the 

 length of the flower, and sparingly plumose with short hairs, or merely 

 tipped with a few such hairs, or not rarely perfectly naked ! 



From the western side of North America are some forms of Cala- 

 magrostis, as yet imperfectly known to me. The species in the books 

 peculiar to that region are perhaps reducible to two, viz. : — 



C. Aledtica, Bongard. Some spikelets from an authentic speci- 

 men, supphed from the Hookerian herbarium, show that I had cor- 

 rectly (in Proceed. Acad. Philad., July, 1862, p. 334) referred here 

 the a pallida, Nutt. in herb. Acad. Philad., a name changed by Mr. 

 Buckley to C. albicans. The species is a well-marked one, with spike- 

 lets 3 lines or more in length, the equal palea of nearly the same tex- 

 ture as the glumes, short hairs at the base of the flower, and a short 

 straight awn. From the character in the Reliquiae Ha^nkeana^ I infer 

 that Deyeuxia Nutkaensis, Presl., is the same thing. 



C. DESCHAMPSioiDES, Trin. Judging from the figure of Trinius 

 and the description in the Flora Rossica, to this may perhaps belong 

 one of Nuttall's species published by Mr. Buckley under the name of 

 C. ruhescens. 



