CRUCIFEKAE 301 



Pods 3"-9" long, many -seeded. 

 Leaves entire. 



Pods smooth. 1. D. Caroliniana. 



Pods hispid. 2. D. micrantha. 



Leaves toothed. 3. D. cuneifolia. 



Pods l // -2 // long, few-seeded. 4. D. brachycarpa. 



1. D. Caroliniana 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. micrantha 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 cuneate at 

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

 barren east of Dodson. April-May. 



4. D. brachycarpa 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. S. myriophylla. 



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

 pubescent : leaves twice pinnate : pods erect, 4 // -7 // 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 5" or less 

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

 July. 



15. ARABIS L. ROCK CEKSS. 



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. 6 / -14 / 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. & G. l-2 high, ascending : leaves oblong, unequally 

 toothed : pods spreading, very slender, 10"-15" long. In wet woods and 

 on wet rocks throughout, but not common. 



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

 ceolate-oblong : pods pendulous, scythe-shaped, 2 / -4 / long. Occasional 

 in rocky woodlands throughout. May- June. 



