114 BOTANY. 



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

 Graham, Arizona, at 0,250 feet altitude (399). The form from Mount 

 Graham is decidedly the more villose. 



Potentilla fruticosa, L.— Colorado (383). Var. Alpina, Wateon.— 

 "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 Anserina, L.— Utah ; Colorado (382). 

 Sibbaldia procumbens, 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, Ilorlcelia, 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* depauperata, 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-H C 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 frequentlv 1 

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

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

 Arizona (3G9, Loew). 



Ivesia Gordoni, 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. 



CiiAM.ERiioDOsf erecta, Bungc. — 2-4' high, villose pubescent, branch- 



• 1\ isia, T. & G.— "Calyx eampannlate, or e\ at Inform al base, lO-deft. Stamens definite (.">. 10, 

 ir>, 20); filaments Blender, narrow!; Bnbnlate or filiform. Carpels few, sometimes solitary, upon a small 

 villous receptacle; stylo Bnbterminal Leaves pinnate, leaflets very numerous, small, palmate or 

 pedately-parted, closely crowded, Bometimes qnasi-verticillate or imbricate on all sides of the racbis; 

 petals broadly obovate, scarcely nngnicnlate, becoming spatnlate."— Gilay, P oe, Am. Acad, vi, 530. 



*('ihm.i:i:ii()I)os, Bnnge.— -Calyx without bractlets, 5erec1 lobes, valvate, Btam< aa short, opposite 

 t«> the petals. Disk lining the calyx-tnbe, the margin with a thick crown of rather rigid hairs. Acbenia 

 r>-iu; styles oiising from near the has.' of the ovaries, where they are articulated, decidu us, sli-hily 



