148 KEY AND FLORA 



inward projection of the lower lip like a palate. Stamens 4 ; 

 a small gland at the base of the corolla on the upper side 

 answers to the fifth stamen. 



a. C. bi'color Benth. A foot or so high ; leaves more or less 

 toothed, the upper ovate-lanceolate, and sessile by a broad base. 

 Flowers on short pedicels, in racemes at the summit of the stem; 

 corolla with the upper lip nearly white, the lower rose-color. 

 Widely distributed in California. 



b. C. Francisca'na Bioletti. Similar to the last, but the flowers 

 are on longer pedicels, more numerous in the whorls; and the 

 throat of the corolla is entirely closed by the palate. This grows around 

 San Francisco and is very common. 



c. C. tincto'ria Hartweg. Flowers almost sessile. Corolla yellow- 

 ish or white, marked with purple dots or lines, the upper lip and 

 its lobes very short. . The plant is covered with a yellowish or brownish 

 glandular pubescence that stains the hands. This is common in the 

 foothills of the Sierras. 



d. C. bartsiaefo'lia Benth. Leaves thickish in texture, linear to 

 ovate-oblong, crenate. Flowers on short pedicels, crowded in the 

 axils of the leaves or bracts. Corolla nearly white, with the throat 

 bearded, and longer than broad, upper lip about the length of the 

 curved throat. This grows in sandy soil in the central and western 

 parts of California. 



e. C. parviflo'ra Dougl. Stems slender, branching, 2-6 in. high, 

 leaves lanceolate or oblong, narrowed at base and entire, sometimes 

 whorled. Flowers on slender pedicels, solitary or several in a whorl. 

 Flowers small, less than in. long. Corolla blue and white, a little 

 longer than the narrow, triangular calyx lobes. Common in the 

 Sierra Nevada range and north to British Columbia. In bloom 

 early. 



IV. PENTSTE'MON 



Perennial herbs with opposite leaves, the upper sessile or 

 partly clasping. Calyx 5-parted. Corolla red, purple, blue, 

 white (rarely yellow), 2-lipped, with a more or less inflated 

 tube ; upper lip 2-lobed, lower 3-cleft or spreading. Stamens 

 4, the fifth a conspicuous filament without an anther. Pod 

 usually pointed, splitting from the top into two parts. 



a. P. cordifo'lius Benth. Stems very leafy, climbing over bushes 



by long branches. Leaves cordate, serrate, or toothed. Flowers in 



a leafy panicle. Corolla scarlet, with a long narrow tube. Sterile fila- 

 ment bearded. Common in southern California. 



