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92 LEAFLETS. 



10, as in U. S. Herb., where also are better specimens by 



John Wolf 



Specimens 



from the same State, from various more recent collectors, are 

 before me, to the nifmber of about 30 plants, all at agreement 

 with the above description, and wrongly labelled T. alpinum. 

 These many sheets show a vast preponderancy of staminate 

 plants, and many that are hermaphrodite, only an insignifi- 

 cant proportion of them being purely pistillate- 



Thalictrum suspensum. Larger plants 9 inches high or 

 somewhat more, the leaves alone often 4 inches, and even 6 in 

 height, the length chiefly that of a very slender and wiry pur- 

 ple petiole, this either ascending or suberect, the leaf proper 

 only 1 or 2 inches long, of about 9 to 11 leaflets, the rachis 

 and petiolules almost filiform ; leaflets pale, glaucescent and 

 dull above, glaucous beneath, cuneate-obovate to flabelliform, 

 broadly and rather deeply 3- to 5-lobed, but lobes commonly 

 abruptly acutish, veins rather prominent on both faces : fruit- 

 ing raceme often 4 or 5 inches long, the fruiting pedicels ^ 

 to K inch long, filiform and seeming pendulous in large plants: 

 achenes commonly 3, quite as often 2 only, sessile, subclavate 

 except as curving outwards, distinctly and very closely and 

 evenly striate. 



High summits above Durango, in southern Colorado, by 

 Baker, Karle and Tracy, 24 July, 1898 ; their n. 437 as in my 

 herbarium. Plant as large as T. leiophyllum, but the foliage 

 coriaceous and veiny. The greatly elongated pedicels are not 

 slender, but rather firm and stiff despite their superficial aspect 

 of being pendulous. It is in deference to this character, sup- 

 plemented by those of the long-petioled and upright leaves, 

 and the narrow flabelliform leaflets, that I feel constrained to 

 place the plant as specifically separate from T. scopulorum. 



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Thalictrum duriusculum. Plants 4 to 7 inches high, the | 



foliage short and compact, the stems stout, rigidly erect, 



Striate-ancrled- in no dejrrpf* mirnle tinted : larc^est leaves 1/^ 



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