CONTRIBUTIONS FROM THE ROCKY MOUNTAIN 



HERBARIUM. XII 



NEW PLANTS FROM IDAHO 



Aven Nelson 



In this paper are continued the studies upon the plants of south- 

 ern and western Idaho, begun in no. IX of this series of Contri- 

 butions. As stated in the preceding paper, the present studies 







are based upon collections made in 191 1, largely by Mr. J. Francis 

 Macbride, but assisted in the field for a time by the writer. There 

 are also included in this paper a few species based upon collections 

 made by Miss June A. Clark, of Boise, at present a student in 

 the Idaho State University. During 191 1 she made very credit- 

 able collections of the plants of the mountains adjacent to Boise, 

 and in the mountains of Washington County of her state. 



Melica Macbridei V. H. Rowland, n. sp .— A green slender erect 

 tufted perennial, 2-5 dm. high, growing from bulbs, which may be 

 solitary or in clusters of 2-6: culms and sheaths (which exceed 

 the internodes) hispid-scabrous on the prominent nerves: leaves 



the sheaths 



mm 



wide 



panicle loosely open; rachis decreasingly scabrous toward the 

 apex, with 3-9 nodes, the first internode 3 . 5-5 cm. long : rays 



the rachis 



cond 



on a short pedicel, the third on a long capillary reflexed pedicel: 

 spikelets 2-5 -flowered, 7-13 mm. long, with terminal flower sterile, 

 never flattened: glumes unequal, herbaceous, scarious-margined, 

 quite often purple-tipped, oblong, acute; the first 4 mm. long, 

 3-nerved and about two-thirds as long as the second ; the second 



lemma thicker than and about equaling 



mm 



the second glume, lightly scabrous throughout, obtusely bifid: 

 palet reaching to the notch in the lemma 

 with the lower part inclosing 



chilla 



the keels from near the middle to the apex: fruit cylindrical 



with the divergent styles sometimes 



Botanical Gazette, vol. 54] 



[404 



