CKUCIFEEAE 101 



Pods Z"-'d" long, many-seeded. 

 Leaves entire. 



Pods smooth. 1. D. Oaroliniana. 



Pods hispid. 2. D. mierantha. 



Leaves toothed. 3. D. eundfoUa. 



Pods l"-2''' long, few-seeded. 4. D. brachyearpa. 



1. D. Carolinlana Walt. l'-6' high, much branching and spreading : 

 leaves oblong-oval, 4'''-10" long : pods linear, longer than the pedicels. — 

 In sandy fields near Independence and Courtney. April-May. 



2. D. mierantha Nutt. Resembles the last but is larger throughout, 

 and the hispid pods are wider. — Common in barrens. April-May. 



3. D. cuneifolia Nutt. Resembles No. 1, but leaves are ouneate at 

 base, and sparingly dentate above : pods minutely hairy. — Common in a 

 barren east of Dodson. April-May. 



4. D. brachyearpa Nutt. l''-4'' high: leaves ovate, entire: pods smooth, 

 oblong. — Wet, sterile prairies, from Little Blue Tank to Greenwood. Rare 

 and local. April. 



14. SOPHIA Adans. Tansy Mustaed. 

 Herbs with twice-pinnatifid leaves and forked pubescence. Pods linear, 

 long-pedicelled, seeds in 1-2 rows in each cell. Cotyledons incumbent. 



Pedicels ascending. 1. S. intermedia. 



Pedicels horizontal. 2. 8. myriophj/lla. 



1. S. intermedia Rydb. 10'-24'' high, glabrous or short-glandular- 

 pubescent : leaves twice pinnate : pods erect, V-1" long. — Often common 

 in dry grounds and waste places throughout. April- July. 



2. S. myriophylla (DC. ) Rydb. Resembles the last, of which it may 

 be but a form, but has horizontal pedicels and pods, the latter ^' or less 

 long. — Dry grounds west of Lee's Summit and probably common. April- 

 July. 



15. ARABIS L. Rock Cbess. 



Pods linear, the valves 1-nerved. Seeds in one row in each cell in 

 ours. Cotyledons accumbent. 



Leaves pinnatifid. 1. A. Virginica. 

 Leaves merely dentate. 



Stem leaves clasping. 2. A. dentata. 



Stem leaves not clasping. 3. A. Canadensis. 



1. A. Virginica (L.) Trelease. G'-W high, diffusely spreading : pods 

 ascending, about V long, on short pedicels. — Very common along the 

 railroad from Pixley's Switch to Buckner, and in wet sandy fields near 

 Grain Valley. Probably native. April-May. 



2. A. dentata T. & 6. l°-2° high, ascending : leaves oblong, unequally 

 toothed : pods spreading, very slender, 10"-\5" long.— In wet woods and 

 on wet rooks throughout, but not common. 



-3. A. Canadensis L. l°-3° high, erect, pubescent below : leaves lan- 

 oeolate-oblong : pods pendulous, scythe-shaped, 2''-4' long. — Occasional 

 in rooky woodlands throughout. May-June. 



