148 BRASSICACEAE. 



1. Radicula brevipes (DC.) Britton, Torreya 6: 30. 1906. 



Nasturtium palustre brevipes DC. Syst. 2: 192. 1821. 

 Nasturtium brevipes Griseb. Mem. Amer. Acad. II. 8: 154. 1860. 



Annual, glabrous or sparingly pubescent below, branched from the base, 

 the branches usually prostrate or nearly so, slender, 3 dm. long or less. Leaves 

 pinnately divided into several or numerous, oblong, ovate or suborbicular 

 dentate segments, or the upper segments confluent; racemes severab-many- 

 flowered, 6-12 cm. long; pedicels about 1 mm. long; flowers about 1.5 mm. 

 long; petals minute or wanting; pods linear, 7-12 mm. long, about 1.5 mm. 

 wide. 



Sink-holes, Andros, near Fresh Greek : Cuba, Hispaniola, Porto Rico. The 

 Andros specimens show foliage only and are referred to this species with hesitation. 

 Short-stalked Yellow-cress. 



5. CONKINGIA [Heist.] Adans. Fam. PI. 2: 418. 1763. 



An erect glabrous annual herb, with elliptic or ovate entire leaves, sessile 

 and cordate at the base, and middle-sized yellowish white flowers in terminal 

 racemes. Sepals and petals narrow. Style 2-lobed or entire. Siliques elon- 

 gated-linear, angled, the valves firm, 1-3-nerved. Seeds in 1 row in each cell, 

 oblong, marginless; cotyledons incumbent. [In honor of Hermann Conring, 

 1606-1681, Professor at Helmstadt.] About 7 species, natives of Europe and 

 Asia, the following typical. 



1. Conringia orientalis (L.) Dumort. Fl. Belg. 123. 1827. 



Brassica orientalis L. Sp. PI. 666. 1753. 



Stem 3-9 dm. high. Leaves light green, obtuse, 5-13 cm. long; racemes 

 elongating in fruit; pedicels 8-16 mm. long; petals about 1.2 cm. long, nearly 

 twice as long as the sepals; pods 7-13 em. long, about 2 mm. wide, 4-angled, 

 spreading. 



Waste grounds. New Provdence, 1916. Widely distributed as a weed in tem- 

 perate North America ; introduced from the Old World. Hare's-ear. 



6. CARARA Medic. Pflg. 1: 34. 1792. 



[Coronopus Gaertn. Fr. & Sem. 2: 293. 1791. Not Mill. 1754.] 

 Annual or biennial, diffuse herbs, with mostly pinnatifid leaves, and small 

 whitish flowers. Silicles small, didymous, laterally compressed, sessile. Sta- 

 mens often only 2 or 4. Valves of the capsule oblong or subglobose, obtuse at 

 each end, indehiseent, falling away from the septum at maturity. Seeds 1 in 

 tctch cell; cotyledons narrow, incumbent or conduplicate. [Greek, crow-foot, 

 irom the shape of the leaves.] About 6 species, of wide distribution. Type 

 opecies: CocMearia Coronopus L. 



1. Carara didyma (L.) Britton, in Britton & Brown, 111. Fl. ed. 2, 2: 167. 1913. 



Lepidium didymum L. Mant. 92. 1767. 



Coronopus didymus J. E. Smith, Fl. Brit. 2: 691. 1800. 



Tufted, spreading on the ground, sparingly pubescent. Stems 0.5-4 dm. 

 long; leaves deeply 1-2 -pinnatifid; flowers white, racemose; pedicels slender, 

 2-3 mm. long in fruit; pod about 2 mm. broad and slightly more than 1 mm. 

 high; valves obtuse at each end and readily separating into 2 ovoid nutlets. 



Streets and waste grounds. New Providence. Eleuthera : Bermuda ; southern 

 t'nited States ; Antigua : Martinique ; South America ; widely distributed in the Old 

 World. Star-of-the-Earth. 



