22 [78] BOTANY. 
Anthers uniform. Fruit globular, flattened, glabrous or nearly so. This should be compared 
with P. laxiflora, Nutt., which we have never seen, and which is compared with P. lanceolata, a 
species having much affinity with the present one. Nuttall’s plant, however, is characterized 
as having the leaflets longer than P. lanceolata, and linear or oblong, the peduncles longer than 
the leaves, the flowers somewhat distant, ete.—Gray, Uss. ‘ 
AMORPHA CANESCENS, Nuit. Gen. 2, p.92. Prairies Indian Territory ; August. 
PETALOSTEMON VIOLAcEUM, Micha. Fl. 2, p. 50, t. 37. Sand banks of the Canadian river, near 
the Shawnee villages ; August. 
PETALOSTEMON MULTIFLORUM, Nutt. ; Torr. & Gray, Fl. 1, p. 309. Prairies on the Canadian, 
near Delaware mountain ; August. 
PETALOSTEMON VILLOSUM, Nutt. Gen. 2, p. 85; Torr. & Gray, 1. c. Sand banks of the Canadian, 
near the Shawnee villages ; August. 
Dauea spinosa, Gray, Plant. T’hurb. p. 315. Arroyos near Williams’ River of the Colorado, 
New Mexico; February 16. In fruit. 
Datza Formosa, Torr. in Anner. Lyc. New York, 2, p. 178, & in Emory’s, Rep. t. 1. Rocks 
and cafions on the upper Canadian ; September. 
Dates LAxrFLorA, Pursh, Fl. 2, p. 741. Prairies of the upper Canadian ; August. 
Datga atopscurorpEs, Willd. Santo Domingo, New Mexico, on the banks of streams ; October. 
Datza Lanata, Spreng. Syst. 3, p: 327. Sand banks of the Canadian, near the Shawnee vil- 
lages ; August. 
Datgea Nana, Torr. in Pl, Fendl. p. 31. Plains of the upper Canadian and New Mexico; 
September—October. 
Dana aurea, Nytt. Gen. 2, p. 101. Prairies of the upper Canadian ; September. 
Date James, Torr. & Gray, Fl. 1, p. 308. Plains of the upper Canadian; September. 
TRIFOLIUM INVoLUcRATUM, Willd. ; Benth. Pl. Hartw. n. 54 }; Gray, Pl. Fendl. p. 33. Banks 
of streams near Santo Domingo, New Mexico ; October. 
TrirotiuM Macrat, Hook. & Arn. in Hook. Bot. Mise. 3, p. 179, & Bot. Beech. p. 330. T. 
albopurpureum, Torr. & Gray, Fl. 1, p.313. Corte Madera, April 10; in fields, Benicia, April 
23; Napa valley, April 26. Variable in height, size of heads, and form of the leaves. 
TRIFOLIUM DicHotomuM, Hook. & Arn. Bot. Beech. p. 330; Torr. & Gray, Fl. 1. p. 691. The 
station of this plant is uncertain, as no ticket accompanied the specimen, but it was probably 
collected near San Francisco. We are not certain that it is a distinct species from the preceding, 
although so much larger in all its parts. 
TRIFOLIUM CILIOLATUM, Benth. Pl. Hartw. p. 304. Corte Madera, April 12 ; Benicia, California; 
April 23. We have specimens of this plant from the valley of the Sacramento, collected by 
Dr. Stillman and Mr. Shelton. 
TRIFOLIUM GRacILENTUM, Torr, & Gray, Fl. 1, p.316. Corte Madera, April 10; Napa valley, 
April 26; Hill sides, Sonoma, California; May 3. 
TRIFOLIUM MicRocEPHALUM, Pursh, Fl. 2, p. 478; Torr. & Gray, Fl. 1, p. 317. Tamul 
Pass, California ; April 11. 
TRIFOLIUM HETERODON, Torr. & Gray, Fl. 1, p. 318. Low wet places, near San Francisco ; 
April 3-8. Legume 4-5-seeded. A good species. 
TRIFOLIUM TRIDENTATUM, Lindl. Bot. Reg. sub. t. 1070. T. involucratum, Torr. & Gray, 1. ¢., 
non Willd. Corte Madera, April 12. 
TRrIFOLIUM MicRODoN, Hook. & Arn. Bot. Mise. 3, p. 180; & Bot. Beechey, p. 330, t. 79. 
Hill-sides; Sonoma, California ; May 3. 
TrivoLiuM FucaTuM, Lindl, Bot. Reg. t. 1883; Torr. & Gray, Fl. 1, p. 619, Los Angeles,’ 
March 21; Benicia and Martinez, April 23-24. 
TRIFOLIUM AMPLECTENS, Torr. & Gray, Fl. 1, p. 319. Corte Madera, April 10; and San 
Francisco, April 3; hill-sides, Benicia, April 24. 
