114 BOTANY. 



hairy.— Ash Creek, Arizona, at 5,225 feet altitude (310), and Mount 

 Graham, Arizona, at 9,250 feet altitude (399). The 'form from Mount 

 Graham is decidedly the more villose. 



Potentilla feuticosa, L. — Colorado (383). Var. Alpina, Watson. — 

 "Low and compact, the leaves very short (2 lines long), linear and 

 revolute; same as 342. [Watson in vol. v, King's Report], Utah." 



Potentilla Anseeina, L. — Utah ; Colorado (382). 



Sibbaldia pkocumbens, L. — Colorado, at 11,000 feet altitude, (403). 

 Though Torrey and Gray (Fl. N. Amer.) state the only difference between 

 Sibbaldia and Potentilla is in the minute petals and fewer pistils and stamens 

 of the former, and though Bentham and Hooker (in Gen. Plant.) do actually 

 unite these genera, I have refrained from following so reliable authorities, 

 because Mr. Watson has excluded Sibbaldia, Horkelia, and Ivesia from his 

 revision of Potentilla. At the same time I do not hesitate to express my 

 opinion that the distinction between Potentilla and Sibbaldia will not stand. 



Ivesia* depaupeeata, Gray (in Herb.) and Brewer and Watson (in 

 Fl. Cal.). Potentilla depauperata, Engelm. (Gray, in Proc. Am. Acad. vol. 

 vii, p. 399). — Villose throughout, 1-1 %° high; stem-leaves with 10-20 pairs 

 of leaflets, 2-4" long, 2" wide, 3-lobed or parted, thickish, villose-pubescent; 

 inflorescence cymose-paniculate ; bractlets about half as long as the purple 

 calyx-lobes; stamens 5; filaments filiform, opposite the calyx-lobes and in 

 the sinuses of the adherent, 5-angled disk; ovaries 2, or frequently 1 

 aborting as the other developes, immersed in the disk, the mouth of Avhich 

 is filled with erect, rather stiff, white hairs. — San Francisco Mountains, 

 Arizona (369, Loew). 



Ivesia Goedoni, Torr. & Gray. — Buffalo Peak, Colorado, 12,000 feet 

 altitude (386). One single location found, and only a few specimens, in a 

 clump of Geum Bossii. 



ChajlerhodosI eeecta, Bunge. — 2-4' high, villose pubescent, branch- 



* Ivesia, T. & G.— "Calyx campanulate, or cyathiform at base, 10-eleft. Stamens definite (5, 10, 

 15, 20); filaments slender, narrowly subulate or filiform. Caipels few, sometimes solitary, upon a small 

 villous receptacle ; style subterminal. Leaves pinnate, leaflets very numerous, small, palmate or 

 pedately-parted, closely crowded, sometimes quasi-verticillate or imbricate on all sides of the rachis; 

 petals broadly obovate, scarcely unguiculate, becoming spatnlate." — Gkay, Pioc Am. Acad, vi, 530. 



t Chamjlrhouos, Bunge. — Calyx without bractlets, 5 erect lobes, valvate. Stamens short, opposite 

 to the petals. Disk lining the calyx-tube, the margin with a thick crown of rather rigid hairs. Achenia 

 5-10; styles arising from near the base of the ovaries, where they are articulated, deciduous, slightly 



