Arabis. CRUCIFERiE. 5$ 



* * Seeds with a broad winged vmrgin. 



4. Arabis l^vigata, DC. Smooth Wall Cress. 



Erect ; whole plant very smooth, and glaucous ; radical leaves obovate, acutely toothed ; 

 cauline leaves sessile ; the lower ones lanceolate, sagittate, sparingly toothed ; uppermost 

 linear, entire ; flowers somewhat spreading ; siliques very long and narrow, recurved-pendu- 

 lous. — DC. syst. 2. p. 237 ; Spreng. syst. 2. p. 892 ; Darlingt. fl. Cest. p. 382 ; Torr. ^ 

 Gr. jl. N. Am. 1. p. 82. A. pendula, Nutt. gen. 2. p. 70, not of Linn. Turrilis laevigata, 

 Muhl. in Willd. sp. 3. p. 543; Pursh,ft. 2. p. 438. 



Biennial. Stem 1-3 feet high. Radical leaves usually of a purplish color, especially" 

 on the under surface, often broadly obovate, and less than an inch in length, with long petioles, 

 but commonly 1-2 inches in length, and either sessile or only attenuated at the base ; cauline 

 leaves 2-4 inches long and about half an inch wide ; the lower ones, as well as those at the 

 root, usually with remote salient teeth. Flowers about 2i lines long. Petals cuneiform, 

 nearly white, or ochroleucous, scarcely longer than the greenish-yellow calyx. Siliques 2-3 

 inches long and less than a line in breadth, somewhat tortuous ; the pedicels 5-7 lines long. 

 Seeds as broad as the septum, conspicuously winged : funiculus adherent at the base. 



In rocky woods and on banks of rivers. May. Fr. June. Common in most parts of the 

 State. 



5. Arabis Canadensis, Linn. SicMe-pod. Turkey-pod. 



Erect; leaves oblong-lanceolate, sessile, attenuate at each end, remotely toothed; pedicels 

 villous, more than twice the length of the calyx, at length recurved ; siliques pendulous, 

 falcate, pointed with the distinct style; margin of the seed very broad. — DC. prodr. l.p. 

 147; Ell. sk. 2. p. 148; Deless. ic. 2. 28 ; Darlingt. fl. Cest. p. 383. A. falcata, Mickx. 

 Jl. 2. p. 31 ; Pursh,fl. 2. p. 437 ; Bigcl.fl. Bost. p. 251. 



Root biennial. Stem 2-3 feet high, smooth above, pubescent below. Leaves 2 to 4 

 inches long, usually more or less pubescent with simple hairs ; sometimes nearly glabrous ; 

 the lowest coarsely toothed or lyrate, attenuated at the base into a petiole. Raceme elongated; 

 the pedicels arillous, even in fruit, spreading, at length recurved. Flowers about 2 lines 

 long. Sepals yellowish or rarely pale purple, hispid. Petals white, oblong-linear, twice the 

 length of the calyx. Siliques 2-3 inches long and 1^ line broad, ancipital. Seeds 20 - 25 

 in each cell, their broad membranaceous margins overlapping one another. Funiculus ad- 

 hering to the septum. 



Rocky woods and hill sides. F/. June. i^r. August. A well characterized species, easily 

 known by its hairy pedicels and broad falcate pendulous siliques. 



