MUSTARD FAMILY 109 



12. BARBAREA. 



1. B. vulgaris R. Br. Winter-cress. Lower leaves elliptic, 

 Yz to 4^ in. long, sometimes with small 

 lobes along the petiole; upper leaves 

 pinnatifid, with a large terminal lobe. 

 Flowers yellow, about ^ in. long, in 

 terminal racemes. Pod \ l / 2 in. long; 

 seeds in 1 row in each cell. 



This is a smooth, somewhat succu- 

 lent perennial with angular stem 6 to 

 16 in. high. It is a widely distributed 

 plant found at Bridal Veil Meadows 

 and is of frequent occurrence in moist 

 places throughout our mountains. The figure represents a 

 sub-alpine form with depressed stem and small pods. 



13. CARDAMINE. 

 1. C. breweri Wats. Leaves mostly compound, with a 

 large roundish terminal leaflet and 1 or 2 small lateral ones, 

 the uppermost and the basal leaves often simple and entire 

 or lobed. Flowers white, about *4 m - long, in terminal 

 racemes. Pods erect, ^ to V/2 in. long, flattened, the seeds 

 in one row in each cell. — A smooth, erect plant, y 2 to 2 ft. 

 high, occurring almost throughout the Sierra Nevada but not 

 yet found in the Yosemite National Park. 



14. ARABIS. 



Erect biennial and perennial herbs with white or purplish 

 flowers in terminal racemes. Herbage with short branched 

 hairs or the upper parts glabrous. Leaves entire or shallowly 

 toothed. Pods compressed parallel to the partition, long and 

 linear. Seeds flat, more or less wing-margined. 

 A. Plants tall, 1 to 3 ft. high. 



Pods erect; plant glabrous except at base. 



Basal leaves 2 to 4 in. long, toothed 1. A. glabra. 



Basal leaves much smaller, entire 7. A. lyallii. 



Pods recurved or spreading. 



Lower leaves ^ to 1 in. wide, upper leaves narrowed 



to the base 2. A. repanda. 



Lower leaves % in. or less wide, upper ones clasping 

 the stem by a broad base. 

 Pods nearly straight, pendent on sharply deflexed 



pedicels 4. A. holboellii. 



. Pods curved, on spreading pedicels 5. A. arcuata. 



