NO. 1230. ,1 REVISION OF CERTAIN ANTENNAR1.T>-NEL80N. 711 



leaves; these spatulate, obtuse or acutish, 6-10 mm. long; involucres 

 iil)Out 7 mm. hig-h.^ 



'^y])Q specimens in the Columl)iti Herbarium, collected by Mearns, 

 no. 40 (Mogollon Mountains, Arizona), andb}'^ Palmer, no. 109 (Arizona). 



Arizona (Palmer, no. 109; Toume3% no. 599; MacDougal) to southern 

 Colorado (Baker, no. (527; Rydberg- and Vreeland, no. 5449). 



Mr. Baker's specimens, determined by Dr. Greene, were distributed 

 under an herbarium name, but 1 can not see in them anything specif- 

 icall} distinct from the Arizonian plant.s. 



fi\ Hea(l>i (•ninparfdirihi lart/i', tJte Inrolucres iirfnnjiiH/ S (7-9) iirm. hli/]i.'^ 



27. Antennaria aprica Greene. Pittonia 3:282. 1898. 

 A. Jiuliui L Lireene, Pittonia 4 : 81. 1891).' 



Lowand usuall}^ densely matted, less than 15 cm. high; leaves cuneate- 

 obovate to narrowly oblanceolate, permanently tomentose on l)oth 

 surfaces, acute to obtuse; heads large for the plant, the pistillate invo- 

 lucres 6-8 mm. high; bracts numerous and imbricated, the tips in the 

 female plant acute or obtuse, dull white or pink, often with a brown 

 spot at the base of the scarious portion, in the male plant broad and 

 obtuse, white. 



Dry groimd along foothills and on open plains; from New Mexico 

 northward to Assiniboiaand Manitoba; also in Utah, western Nebraska, 

 and western South Dakota. 



Of this conunon Rocky Mountain species I have examined some 50 

 sheets. Though quite variable and running into numerous forms, 

 it is well marked and readily distinguished from related species. 

 The typical form has ''cuneate-oblanceolate acutish" leaves and dull 

 whit(^ bract tips, but forms with much broader and obtuse leaves are 

 couuuon, and pink-tipped bracts or brown-spotted ones may be found 

 in most of the forms. The pistillate l)racts in the majority of sheets 

 examined are obtuse. Forms with narrower and acute or acutish 

 bracts, however, are not uncommon, and these apparently are of fre- 

 quent occurrence in southern Colorado. The male plants are much 

 less connuon than the female ones. On the Laramie Plains of southern 

 Wyoming the one is about as common as the other. The pistillate 

 bracts have obovate or oval, obtuse tips, and the dilated portion of the 

 pap})UM is linear to oblong-linear and serrate, or nearl}' entire. I can 

 not legard A. hohnU in any other light than as one of the many forms 

 of this species. 



28. Antennaria recurva Greene, Pittonia 3 : 290. 1898. 



Like the preceding, but less cespitose, the stolons short and stout, 

 rooting tardily, ver}" leaf}^ terminally; leaves narrowly spatulate, 

 acutish, inclined to be conduplicate and recurved near the tip, perma- 

 nently hoary-tomentose on both surfaces, and more densely so beneath; 



' For full description, see Pittonia 3 : 289. 1898. 



^The following ally of A. dioica occurs in Greenland: 



A. liyjjerborea (Winch.) Don, in Engl. Bot. Suppl. pi. 2640. 18;-{1. G)Uiph(tUnm 

 Juiperboreum Winch. Arr. ed. 7. 3:926. 1830. Also found in northern Euroi)e. 



^ Type localUy . — "In open places among the more elevated pine woods on Longs 

 Peak, Colorado." Collected by Holm; type in the herbarium of E. L. Greene. 



