g20 Vermischte neue Diagnosen. 



floribus breviter protrusis albis; calyce basi tubulato superne fisso, lobis 

 6 linearibus acuminatis inaequalibus; corolla breviter infundibuliformi,- 

 lobis rotundatis; staminibus, 4 protrusis, fllamentis corolla longioribus, 

 antheris oblongis, capsula ovoidea haud pedicellata. 

 Sumatra in ora orientali (Micholitz). 



LXXVII. Vermischte neue Diagnosen. 



282. Arnica aprica Edw. L. Greene in Ottawa Naturalist, XV (1902), 

 p. 280. 



Also akin to A. latifolia and like it commonly more or less pubes- 

 cent, but the hairs less rigid, and obviously jointed; the whole plant 

 much smaller in all its parts, and the heads more numerous: radical 

 leaves long-petioled and broadly or narrowly cordate-ovate, the cauline 

 oval, sessile, all serrate or dentate, the teeth callous-tipped: bracts of 

 turbinate involucre few, thin, oblanceolate, acute or acuminate, often 

 purple-tipped, nearly glabrous: rays few, rather deep-yellow, not deeply 

 toothed, the teeth short and broad: disk-corollas with slender tube about 

 as long as the subcylindric but abrupt limb: pappus firm, white; achenes 

 long and slender, glabrous except a few obscure bristly very short hairs 

 and as few minute glands about the summit. 



British Columbia: This is represented by Mr. James Macoun's 

 numbers 26284 and 26285 from the Chilliwack Valley. 



It is said to be a plant not of the woods, but of open ground along 

 streamlets. It is readily distinguishable from A. latifolia not only by its 

 smaller size and more numerous flowers, but by the character of its 

 pubescence, and especially by its short merely tridentate rays; these last, 

 in the real A. latifolia, being elongated, and very deeply cut at summit 

 into narrow almost ligulate teeth or segments. 



283. Arnica confinis Greene, 1. c, p. 281. 



Less than a foot high, monocephalous, or else with also a pair of 

 monocephalous peduncles from the axils of the uppermost pair of leaves, 

 these surpassing the terminal one; herbage of a light green, viscid- 

 puberulent as to the foliage, the stem with a sparse hairiness: lowest 

 leaves obovate to oblanceolate, an inch long or more and petiolate, the 

 cauline in about three pairs, ovate to lanceolate, 1 to 2 inches long, 

 callous-denticulate, or serrate-dentate, or even subentire, acutish: heads 

 of middle size, the involucral bracts biserial, acuminate, sparsely hirsute: 

 rays deep-yellow, not large; disk-corollas with hirsute tube and naked 

 limb about equal; achenes with a few hirsute hairs; pappus tawny, sub- 

 plumose. 



British Columbia: Chilliwack Valley, Mr. Macoun, no. 26933. 



In characters of pubescence, flower and fruit this approaches A. ovata 

 Greene, but in foliage and habit it differs widely. 



