78 PROCEEDINGS OF THE AMERICAN ACADEMY 



* * Panicle strict, its branches short and erect or oppressed after 

 flowering, and the glumes mostly closed: lower palea membrana- 

 ceous or even of nearly as firm texture as the glumes, scabrous: 

 awn stoider. 



^— Hairs of the base of the flower copious, nearly equalling or only aboitt 

 one third (or rarely one half) shorter than the thin-membranaceous 

 lower palea, not surpassed by those of the rudiment : awn straight 

 or slightly bent, barely exceeding the palea. Leaves narrow and 

 mostly inclined to be involute. Northern and Arctic species, also 

 European. 



3. C. STRiGOSA, Wahl., under Arundo, according to Fries, Anders- 

 son, &c. Glumes lanceolate and gradually subulate-acuminate, consid- 

 erably exceeding the flower, 2|^ to 3 lines long, scabrous on the keel ; 

 awn from or below the middle of the palea. — Referring to the remarks 

 under the preceding species, I have only to add, that I have never 

 seen an American or even a Greenland specimen of O. strigosa, as un- 

 derstood by Fries (Herb. Norm.) and all recent Scandinavian botanists, 

 but have di'awn the character from specimens of Fries and Blytt. The 

 Canadian specimen mentioned by Grisebach in Flora Rossica proba- 

 bly belongs, like the Sitcha plant, to G. Langsdorfjii, which, in the un- 

 expanded state, might be confounded with it. The rudiment of the 

 second flower, in all the specimens examined, is short and wholly or 

 almost naked ! 



4. C. Lapponica, Trin. Glumes oval-ovate or lanceolate-ovate 

 and short-acuminate or acute, about 2 lines long, little exceeding the 

 flower ; awn from slightly or much below the middle of the palea 

 (hairs scarcely or nearly one half shorter than the flower). — Labrador 

 and Greenland ( C.Grcenlandica, Kunth.), and Arctic sea-coast. Lower 

 Canada, Pursh, Canad. Herb. ! 



5. C. STRiCTA, Trin. Panicle larger and more lobulate, the spike- 

 lets more numerous, smaller (about a line and a half long), and more 

 crowded than in the preceding ; glumes lanceolate- or ovate-oblong, 

 obtuse or acute; awn fi'om the middle of the palea or lower. — Canada 

 to the Arctic regions, the Rocky Mountains, &c. Spikelets mostly (but 

 not always) larger than in the Scandinavian plant. Ledges at Wil- 

 loughby Lake, N. Vermont, W. Boott: a rather luxuriant form, with 

 spikelets nearly two lines long, resembling C. chalybcea. Fries, beino- to 

 G. stricta what that is to G. Lapponica. Indeed, these two species 

 appear to run together. 



