BRASSICACEAE. 155 



or dentate; pedicels spreading or ascending, often 2 cm. long in fruit; 

 pods 3-5 cm. long; beak 8-10 mm. long. 



Frequent in waysides and neglected gardens. January-April. 

 In favored places often flowering nearly throughout the year. 



9. RAPHANUS L. Radish. 



Erect or widely branching from the base, annual or 

 biennial herbs, with lyrate leaves and showy fiowers. 

 Sllique elongated linear, fleshy or corky, constricted or 

 continuous and spongy between the seeds, indehiscent. 

 Seeds globose. Cotyledons condupllcate. 



1. R. sativus L. Biennial or annual from a more or less elongated 

 fleshy root; erect and freely branching, 3-5 dm. high, sparsely pubes- 

 cent with stiff hairs or nearly glabrous above; lower leaves deeply 

 lyrate-pinnatifid; segments crenate or dentate; flowers 12-18 mm. 

 broad, yellowish or commonly whitish with purple veins; pods 2-4 

 cm. long, constricted between the seeds when mature; seeds 2- 

 several; beak conical, 1-2 cm, long. 



Frequent in poorly cultivated fields and waste places, especially 

 in sandy soils. April-June or often throughout the year. 



10. BARBAREA R. Br. 



Erect glabrous biennial or perennial branching herbs 

 with angled stems, pinnatlfid leaves and racemose yellow 

 flowers. Sllique elongated linear, 4-angled; valves 

 keeled or ribbed; style short; stigma 2-lobed or capitate. 

 Seeds in 1 row in each cell, flat, oblong, marginless. 

 Cotyledons accumbent. 



1. B. barbarea (L.) MacM. Tufted stems erect, 3-6 dm. high; 

 lower leaves petioled, 5-12 cm. long, lyrately-pinnatifid, segments 

 oval or obovate, repand-toothed or sometimes entire; upper leaves 

 sessile, rarely clasping; flowers yellow, 6-8 mm. broad; pods spread- 

 ing or ascending, about 2 cm. long, obscurely 4-angled; pedicels 

 about 4 mm. long. {B. vulgaris R. Br.) 



Moist places in the mountains, confined mostly to the pine belt. 

 June-August. 



11. SISYMBRIUM L. 



An aquatic or uliginous herb, with pinnately divided 

 leaves, and small white flowers in terminal racemes. 

 Pods linear to linear-oblong, slender pedicelled, tipped 

 with the rather stout style, the valves nerveless. Seeds 

 In 2 rows in each cell. Cotyledons accumbent. 



1. S. nasturtium-aquaticum L. (Watercress.) Aquatic, gla- 

 brous; stems branching, floating or creeping, rooting from the 

 nodes; leaves odd-pinnate; leaflets 3-11, roundish or oblong, nearly 



