PULSE FAMILY. Leguminosae. 



This species has similar flowers, but 

 they are considerably larger and borne 

 on a slender stalk which rises from the 

 plant-stem at the point where the leaf- 

 stalks spring outward. The broad, 

 pointed leaflets are much larger and a 

 The strange seed-pod like that of the fore- 

 going species is 2-3 jointed. The name is from 8e6/u 6<S 

 a chain, alluding to the connecting joints of the pod. 

 By means of these joints the pods attach to the furry 

 coats of animals. 1-4 feet high. The same distribution. 

 The stem of this silky hairy tick trefoil 

 bends or lies near the ground. The leaflets 

 are quite round, comparatively speaking, 

 soft-hairy, and not pointed. The flowers 

 are light purple-magenta, and the pod 

 3-5 jointed, constricted nearly equally at 

 2-5 feet long. About the same distribution. 

 This species has oblong lance-shaped 

 leaflets, or quite ovate ones, nearly if .not 

 quite smooth above, an erect and nearly 

 smooth stem, and branching flower-stalks 

 bearing very small pale magenta flowers. 

 Pod 2-4 jointed, the sections nearly triangular. 2-3 feet 

 high. Not farther south than Va. and Ky., west to Neb. 

 A still narrower-leaved species, the deep 

 green leaflets scarcely 2 inches long, and 

 linear lance-shaped, resembling willow 

 leaves. The flower-spikes are rather hori- 

 zontally branched ; Pale magenta flowers 

 Pod 4-6 jointed. The slender stem 2-3 feet 

 high. Common. 



The most showy species of the genus, 

 Canadian Tick ^^ cr0 wded flower-clusters terminating 

 Desmodium a tan > stout < ana " hairy stem. The leaves 

 Canadense are nearly without stalks, or with short 



Dull magenta- ones, and the three leaflets (longer-stalked) 

 are oblong lance-shaped. The flowers 

 (larger than those of the other species) are 

 nearly £ inch long, and vary in color from 

 magenta to magenta-pink. Pods 3-5 jointed and quite 

 218 



Desmodium 

 acuminatum 

 Pale magenta 

 June- 

 September 



trifle hairy. 



Desmodium 

 rotnndifoUwn 

 Purple- 

 magenta 

 July- 

 September 



both edges. 



Desmodium 

 DiUenii 

 Pale magenta 

 June- 

 September 



Desmodium 

 )><tiiiculatuui 

 Pale magenta 

 July- 

 September 



very small. 



July- 

 September 



