84 
BOTANY. 
Ciiablebatia foliolosa, Benth. PI. Hartiv. p. 308; Torr. PI. Fremont., p. 11, t. 6. Hill-sides 
and ravines, Sonora ; May 9. 
Cowania Mexicana, Don in Linn. Trans. 14, p. 574, t. 22; Gray, PI. Wright. 2, p. 55. 
Mountains near the Zuni river. In leaf only. 
Cowania Stansburiana, Torr. in Stansb. Pep., p. 386, t. 3. Ojo Piscado ; November 19. 
San Francisco mountain, and Lithodendron creek, New Mexico ; December. Although very 
near C. Mexicana it seems to retain its characters. 
Acaena trifida, Ruiz & Pav. FI. Peruv. 1, p. 67, t. 104. A pinnatifida, Hook. & Am. 
Bot. Beechey, p. 339; Torr. & Gray, FI. 1, p. 430, non Ruiz & Pav. San Geronimo Ranch; 
April 12. 
Adenostoma fasciculata, Hook. & Am. Bot. Beechey, p. 139 & 338, t. 30; Torr. & Gray, 
FI. 1 ,p. 430. Sandy hills near Cajon Pass, March 16, (with the fruit of the preceding year.) 
Hill-sides, near Ion valley ; May 18. 
Alchemilla arvensis, Scop. FI. Cam. 1, p. 115; Torr. & Gray, FI. 1 , p. 432. A. occiden- 
talis and A. cuneifolia, Nutt, in Torr. & Gray, FI. 1. c. Hill-sides, Benicia, April 24. Low 
places near San Francisco, April 8. We find the characters of this species to he quite variable, 
so os to include the two species of Nuttall. 
Fallugia paradoxa, Torr. in Emory’s Rep. 2. Canons of the Pecos, New Mexico; September. 
IIoricelia capitata, Lindl. Bot. Reg. sub fol. 1997 ; Torr. & Gray, FI. 1, p. 434. San Gabriel, 
California; March 21. In Dr. Bigelow’s specimens,, as also in those collected at Los Angeles by 
Mr. Wallace, the petals are quite as long as the calyx. Agrees pretty well with our Douglasian 
specimen, except that the cymes are not capitate ; but in most of the species of this genus the 
inflorescence is at first dense, and unfolds with age. 
Horkelia fusca, Lindl. Bot. Reg. t. 1997. Yar. tenuiloba: canescenti-villoso; foliolis 25-30, 
latissime-cuneatis profunde-palmitifidis ; laciniis anguste-linearibus ; cymis laxiusculis; bracteolis 
calycis dentibus submqualihus; petalis cuneatis, apice hilohis. Laguna of Santa Rosa creek, 
California ; May 1. Radical leaves 4-6 inches long, mostly villous with greyish hairs; leaflets 
less than half an inch long, palmately 5-7-cleft; the segments scarcely half a line wide; cauline 
leaves with a much smaller number of leaflets, with 3-4 segments. Stem about a foot high. 
Cyme somewhat open when the inflorescence is fully developed. Flowers about as large as in 
H. parviflora. Proper segments of the calyx triangular-lanceolate; the bracteoles narrowly 
lanceolate. Petals white, narrowly cuneiform, deeply notched at the summit. 
Horkelia tridentata (sp. nov.) : subsericeo-villosa; caulibus patenti-diffusis; foliolis 7-11 
ohlongo vel obovato-cuneatis apice plerumque tridentatis; stipulis profunde laciniatis; cymis 
densifloris; bracteolis calycis segmentis brevioribus et angustioribus; petalis obovato-spathulatis. 
(Tab. VI.) Wet ravines, DufAeld’s Ranch, Sierra Nevada ; May 10 ; and hill-sides, Mammoth 
Grove, California; May 15. A span or more in height. Leaflets of the radical leaves 9-11, 
about half an inch long, almost uniformly 3-toothed at the apex, the intermediate tooth often 
smaller, otherwise entire; those of the cauline leaves (5-7) narrower. Petals at first nar¬ 
rowly spatulate, hut broader when fully expanded. Somewhat resembling H. parviflora; the 
flowers being quite as small as in that species. 
Potentilla Pennsylvania, var. IIipriana, Torr. & Gray, FI. 1, p. 438. Sandia mountains, 
New Mexico ; October ; in fruit. Some of the specimens nearly accord with P. diffusa, Gray, 
PI. Fendl. p. 41, which Prof. Lehmann, the learned monographer of the genus, has no doubt cor¬ 
rectly arranged as a variety of his P. Ilippiana, viewed by him as distinct from P. Pennsylvanica. 
Potentilla Anserina, Linn. Sp. 1, p. 495; Torr. & Gray, FI. 1, p. 444. Wet places, San 
Domingo, New Mexico; October. Near San Francisco, California ; April 3. 
Potentilla rivalis, Nutt, in Torr. & Gray, FI. 1. c. Wet places near San Francisco, April 8. 
Potentilla glandulosa, Lindl. Bot. Reg. t. 1583; Torr. & Gray, FI. 1, p. 446. Mountains 
near Oakland, California; April 4. 
