276 Karl M. Wiegand and Arthur J. Eames 



1. A. canadensis L. (A. caroliniamis L.) Milk Vetch. 



Damp gravelly, more or less calcareous, soils; infrequent. July 15-Aug. 15. 



S. w. corner of Cayuga Lake, toward Glenwood (£>.!); Taughannock Point; 

 Crowbar Point (D.) ; n. of Esty Glen; Myers Point; n. of Lake Ridge; s. of Willets; 

 "occasional on both shores as far as Cayuga Bridge" (£>.). 



W. Que. and Lake Champlain to Hudson Bay and Sask., southw. to Ga., La., 

 Nebr., and Utah ; rare or abserrt in granitic N. E. and on the Coastal Plain. 



A. canadensis L. and A. carolinianus L. were apparently first united by Torrey 

 and Gray, under the former name. 



2. A. neglectus (T. & G.) Sheldon. (A. Cooperi of Cayuga Fl.) 



Rocky lake banks, in calcareous regions, in shale talus or talus mixed with gravel ; 

 rare. June 20-July 15. 



S. of Portland Point (Shurger Glen, D. !) ; n. of Portland Point; n. of Ludlow - 

 ville (D.) ; n. of Lake Ridge; n. of Atwaters ; s. of Willets; s. of Levanna (D. !). 



Que. (?), Ont., and w. N. Y., to Minn, and Iowa; absent on the coast. 



13. Coronilla L. 

 1. C. varia L. 



Grassy roadsides, in gravelly or sandy soil, the lime content of which is unknown; 

 occasional. Aug. 



North Spencer village; opposite the church, Asbury (A. Gershoy) ; Salmon Creek, 

 at the crossroads s. of Genoa; one mile n. of Genoa (R. S. Nans). Of recent intro- 

 duction. 



N. E. to N. Y. and N. J. Adventive from Eu. 



14. Desmodium Desv. 24 



a. Joints of the loment straight or concave on the back, loment very long-stalked ; 

 stamens monadelphous below ; peduncles very long and leafless ; leaves clustered. 

 b. Leaves and flowers on separate stems ; leaflets ovate, barely acute. 



1. D. nudiflorum 

 b. Leaves clustered below the middle of the flowering stem ; leaflets orbicular, 

 strongly acuminate. 2. D. grandiflorum 



a. Joints of the loment more or less convex on the back; stalk not more than twice 

 the length of the calyx ; stamens usually diadelphous ; peduncles not conspicu- 

 ously elongated ; leaves scattered. 

 b. Plant trailing, soft-hairy ; peduncles axillary and terminal ; leaflets orbicular, 

 obtuse. 3. D. rotundifolium 



b. Plant erect, glabrous or hairy ; racemes panicled ; leaflets narrower. 

 c. Stipules and bracts large and conspicuous (1-1.5 cm. long) ; leaves ovate, 



acuminate ; stem glabrous except in the panicle. 4. D. bractcosmn 



c. Stipules smaller, inconspicuous. 



d. Stalk of the loment equaling or exceeding the calyx; joints very unequal- 

 sided. 

 e. Leaflets ovate, pubescent especially beneath ; stems granular-puberulent, 



and often pilose. 5. D. Dillenii 



e. Leaflets oblong-lanceolate to linear-lanceolate, slightly strigose ; stems 

 glabrous. 6. D. panicidatani 



d. Stalk of the loment very short or wanting; joints more equal-sided. 



e. Plants stiff, tall and stout, more or less villous ; bracts conspicuous 

 before flowering ; inflorescence dense ; flowers showy ; leaflets 35-70 mm. 

 long, the lateral ones longer than the petiole. 7. D. canadcnse 



e. Plants more diffuse and slender, glabrous or nearly so ; bracts inconspicu- 

 ous ; inflorescence more open ; flowers inconspicuous ; leaflets 7-25 mm. 

 long, the lateral ones shorter than the petiole. 8. D. marilandicum 



24 Commonly called Tick Trefoil. 



