330 SCROPHULARIACEAE. 



or thyrses. Calyx 5-parted, the lobes mostly obtuse. 

 Corolla irregular, the tube globose or oblong, not gibbous 

 or spurred at the base, the limb 5-lobed, the 2 upper 

 lobes longer, erect, the lateral ones ascending, the lower 

 spreading or reflexed. Stamens 5, 4 of them anther- 

 bearing, didynamous, declined, the fifth sterile and re- 

 duced to a scale on the roof of the corolla-tube; anther- 

 sacs confluent into 1. Style filiform; stigma capitate 

 or truncate. Capsule ovoid, septicidally dehiscent. 

 Seeds rugose. 



1. S. californica Cham. Stems erect, 1-2 m. high, glabrous 

 below, above finely glandular-pubescent; leaves ovate, cordate at 

 base, serrate or incised-serrate, 6-18 cm. long; flowers about 8 mm. 

 long; corolla dull red. 



Frequent in the foothills and mountains below the pine belt. 

 March-June. 



5. PENTSTEMON Soland. 



Perennial herbs or suffrutescent plants, with opposite 

 or rarely verticillate leaves, and large showy flowers in 

 terminal racemes, panicles or cymes. Calyx 5-parted. 

 Corolla irregular, tubular and often inflated, the limb 

 2-lipped, the upper lip 2-lobed, the lower lip 3-lobed. 

 Stamens 5, included, 4 antheriferous and didynamous, 

 the fifth sterile, as long or shorter than the others; anther- 

 sacs divergent or connivent. Style filiform; stigma 

 capitate. Capsule septicidally dehiscent. Seeds numer- 

 ous, mostly angled. 



Anther cells dehiscent for their whole length or nearly so. 

 Flowers red or purple. 



Corolla-tube not dilated. 



Woody half climbers; leaves toothed. 



Leaves subcordate or ovate. 1. P. cordif alius. 



Leaves linear-lanceolate. 2. P. ternatus. 



Herbaceous erect perennials; leaves 

 entire. 

 Flowers in a simple raceme. 3. P. lahrosus. 



Flowers in a narrow panicle. 4. P. centr anthif alius . 

 Corolla-tube dilated. 



Herbage glabrous throughout; ster- 

 ile filament glabrous. 

 Upper leaves connate. 5. P. spectahilis. 



Upper leaves not connate. 6. P. parishii. 



Herbage glabrous except the gland- 

 ular or primose-puberulent in- 

 florescence; sterile filament beard- 

 ed. 7. P. palmeri. 



