OF ARTS AND SCIENCES : MAT 30, 1865. 523 



sistentem subfBquantibus. — In a ravine between Monte Diablo and the 

 San Joaquin. Heads about the size of those of the small form of T. 

 gracilentum, to which species this is allied. 



Trifolium monanthum : Involucraria, pygmaeum, parce villosu- 

 lum, e radice exili (annua ?) ramosum ; stipulis ovato-lanceolatis sub- 

 foliaceis integerrimis 3 - 5-nervatis cuspidato-acuminatis ; foliolis obo- 

 vato-cuneatis nunc retusis mucronato-dentatis ; pedunculo folium baud 

 superante ; involucre unifloro (rarius bifloro) fere diphyllo calyce cylin- 

 draceo dimidio breviore ; corolla albo-purpurascente elongata. — Moist 

 bank by Soda Springs, Tuolumne River, alt. 8,700 feet. A very distinct 

 little species, only about an inch high, the stems or branches terminated 

 by a peduncle of 3 to 9 lines in length. Leaflets 2 or 3 lines long. 

 Corolla half an inch long, twice or thrice the length of the calyx (the 

 teeth of which are broadly lanceolate, spinulose-pointed, and shorter than 

 the tube), somewhat glandular on the elongated tube, not scarious or 

 inflated after flowering. Legume stipitate, two-seeded. Leaves of the 

 involucre mostly two-cleft. 



Trifolium amplectens, Torr. & Gray, occasionally white-flow- 

 ered, instead of a nearly sessile 4 - 6-seeded legume, as in the specimens 

 of Douglas, has it stipitate and with only one or two large seeds (in- 

 deed with the ovary biovulate) in those of Coulter, Bigelow, and Brew- 

 er. Generally there is a central pedicellate flower, under which is a 

 minute truncate involucel, like the involucre of the following plant ; 

 sometimes indeed this involucel is two-flowered, showing a tendency in 

 the head to become proliferous. 



Trifolium depauperatum, Desv. {T. stenophyllum, Nutt. PL 

 Gamb. p. 151 ?), now identified in California, adds another to the Clo- 

 vers common to that country and to Chili. Dr. Brewer collected two 

 forms on successive days (April 18 and 19) in the vicinity of Sonoma. 

 One, which is slender and erect from an annual root, well accords with 

 specimens of Gay's Flora Chilena, except that the flowers are rather 

 larger and a few more in the head ; and the leaflets are longer and nar- 

 rower ; while Fremont gathered (in 1845, no. 235) the exact counter- 

 part of the Chilian plant. Dr. Brewer's other form is more tufted and 

 decumbent, the root as if perennial. The involucre in T. depauperatum 

 is minute and truncate, or reduced to a mere scarious ring. The central 

 flower is commonly pedicellate and with an obsolete involucel, just as 

 in T. amplectens, and the calyx, corolla, &c., so accord with that spe- 



