PULSE FAMILY. 105 



■>- H- Stems erect, 2° - 6° high : stipules and bracts mostly awl-shaped, small and 



inconspicuous or early deciduous : racemes panicled. 

 •"■ Common petiole slender : flowers smallish : joints oj^pod 3-5, unequal-sided, 



D. viridiflbrum. Stem and lower surface of the broad ovate blunt leaf- 

 lets clothed with white and soft-velvety down. Pine-barrens, from New Jei'scy S. 



D. ISBvig&tum. Stem and the tliicldsh ovate and bluntish leaflets smooth 

 or nearly so. From New Jersey S. 



D. Dill^nii. Stem and the oblong or oblong-ovate bluntish thin leaflets 

 finely pubescent ; the latter 2' - 3' long. 



D. panicilliltuin. Smooth or nearly so throughout ; leaflets lanceolate 

 or lance-oblong, tapering to a blunt point, 3' -5' long; panicle loose. 



D. strictum. Slender stems smooth below, above and the narrow panicle 

 rough-glandular ; leaflets linear, blunt, reticulated, very smooth, 1 ' - 2' long. 

 From New Jersey S. 



+* •"■ Common petiole ven/ short. 



D. Canadense. Stem hairy, 3° -6° high, leafy up to the panicle; leaf- 

 lets lancc-oblong, blunt, 2' - 3' long ; racemes dense, the pink-purple flowers 

 larger tlian in any other, fully ^'. long ; bracts large, conspicuous before flower- 

 ing. Chiefly N. & W. 



1). sessilifdlium. Stem pubescent, 2°-4° high; the long panicle naked; 

 common petiole hardly any; leaflets linear or linear-oblong, blunt, reticulated, 

 rough above, downy beneath ; flowers small. Penn. to 111. & S. 



•*^ -t- •*- Stems ascending or spreading, 1 ° — 3° long : stipules and bracts awl- 

 sliaped and deciduous : panicle naked, loose ; flowers small ; pod of 2 or 3 

 small oval or roundish joints. 



D. rigidum. The largest of this section, with rough-pubescent stems 

 sometimes erect ; leaflets ovate-oblong, blunt, thickish, roughish and reticulated, 

 V -2^' long, longer than the common petiole. 



D. eiliare. More or less hairy, slender, very leafy ; common petiole very 

 short ; leaflets round-ovate or oval, thickish, J' - 1' long. 



D. Marildilidicuin. Smooth or nearly so, slender ; leaflets ovate or 

 roundish, thin, the lateral ones about the length of the slender petiole : other- 

 wise like the preceding. 



+- ^- -(- ^- Stems reclining or prostrate : rctcejnes axillary and terminal. 



D. liue&tuin. Smoothish ; stem striate-angled ; stipules awl-shaped, 

 deciduons ; leaflets orbicular, 1' or less in length, much longer than the common 

 petiole ; flowers and 2 or 3 rounded joints of the pod small. Pine-barrens from 

 Maryland S. 



D. rotundif61illlll. Soft-hairy; stems running 3° - 5° along the ground ; 

 leaflets orbicular, about 3' long ; stipules ovate, striate, taper-pointed, persist- 

 ent ; flowers and the 3-5 rhorabic-oval joints of the pod rather large. 



§ 2. Exotic, conservatory species. 

 T). g^rans, of East Indies, one of the most extraordinary plants known. 

 Is readily grown as a tender annual : the smooth leaves are remarkable for their 

 movements ; the end leaflet slowly changing position with the light ; the lateral 

 ones, very much smaller, moving pretty rapidly up and down, in elliptical 

 sweeps, through the day when the temperature is about 80° Tahr. 



18. -ffiSCHYWOMElSrE, SENSITIVE JOINT -VETCH. (From 

 Greek word meaning ashamed, the leaflets of some species lieing more or less 

 sensitive to the touch in the manner of the common Sensitive Plant.) Sta- 

 mens commonly in two sets of 5 each. Pod resembling that of Desmodium. 

 Fl. summer. 

 ffl. hispida. Stem i-ough-bristly, 2° -4°' high; leaflets very many, broadly 



linear ; joints of the bristly pod 6 - 10, nearly square. Low grounds from 



Penn. S. O) 



-ffi. viscidula. Stems clammy-piibeseent, slender, spreading on the ground ; 



leaflets 7-9, obovate ; joints of the bristly pod 2 or 3, half-orbicular. Sandy 



shores S. (T) 



