152 



November 3, 1861. 

 ^ • President in the Chair. 



Dr. Kellogg read the annexed paper : 



The following fonn of Ceanofhus was found ui the Yo-Semite 

 Valley, by Madam Werthermann. 



Ceanothus nevadensis, (Kellogg.) Fig. 45. 



Stem bright green, similar to the leaves, nearly glabrous, warted, 

 scarcely angled. 



Leaves ovate, sub-acute, mucronate by a conic gland, entire, 

 lamina thin, sub-coriaceous, dull lustrous pitted above (not varnished 

 nor resinous) ; glaucous, reticulate, and very short appressed pub- 

 escent beloAv, three moderiltely prominent ribs from the base ; the 

 smaller leaves often ovate-oblong, sub-acute or somewhat obtuse. 

 Petioles very slender, appressed pubescent, half an inch or more in 

 length, a few dark purple conic glands above scattered along the 

 upper third, stipules subulate, acuminate, ciliate. Panicles elon- 

 gated, terminal, five or six inches' in length, leafy at the base, sec- 

 ondary subdivisions very short, filiform, pedicels glabrous like the 

 calyx. Flowers white, small, calyx segments incurved. 



Remarks. — This species appears to be closely aUied to C. velio- 

 timis. But the leaves are not rounded, cordate, nor serrate ; nei- 

 ther is the slender elongated racemoid-panicle " thrice compound," 

 nor m the general appearance is it so large and robust. Could the 

 shaded damp and lofty habitat of this plant cause so great difference 

 as we have observed ? The leaves, we observed, are not at all var- 

 nished, shming, nor resinous, nor exhahng the strong odor of C. 

 velufinus. • 



Torrey says C. velutinus has " axillary panicles," This is probar 

 bly a mistake, if we recollect rightly. These certauily are not 

 axillary. 



Streptanthus torfuosus, (Kellogg.) Fig. 46. 



Stem simple or branching, glabrous and glaucous throughout. 



Lower leaves petiolate, lamina somewhat spatulate, cuneate at base, 

 entu'e, serrate above, obtuse, or sub-acute. 



Middle cauline leaves oblong, sub-acute, serrate above, entire 

 below, and slightly narrow^ed towards the sagittate base. 



Bracts orbicular, clasping, entire, or minutely repand-denticulate ; 

 about two to four, distributed at the base of the branches and lower 

 siUques. 



Racemes simple or branching, pedicels erect (about one-eighth of 

 an inch in flower, increasing to one-fourth or half an inch in frait), 

 shorter than the calyx. 



