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V , I 



186 



CONTPiIBUTIONS FROM THE NATIONAL HEEBARIUM. 



L D, harhatuin. 



2. D. irijlorum 



connate -vvilh the others; ovary sessile or stipitato; style inflexed; ,«tigma small, tor- 

 minul, often capitate; pod exsertedj sessile, or stlpitate, eomprei=sed, superior suture 

 straight or like the inferior more or less sinuate, with 1 to many membranous or eori- 

 aceous articulations, Hat or rarely suhiurgid, glabrous or more or less hispid, usually 

 indehiscent at maturity and separating from one another, soTiietimes dehiscing I)y the 

 inferior suture; seeds 2 to many^ ovoid or globose-roniform, compressed. — Herbs or 

 shrubsj sometimt^s arboreous or scandent; iQaves bipinnatc; h^aflets usually 3, sonn^- 

 times only 1 (the terminal), rar(dy 5, often rather large, with stipels; stipules often 

 scarious, striate, or connate; flowers small, rose-colored, purple, l>Iuish, or wliite, in 

 compound rarely simple racemes, terminal, or axillary; occasionally solitary or a few 

 fascicled in the axils; bracts often membranousj subuhite, striate, persistent, or 



■ 



caducous; bracteoles distinct and persistent or very small and caducous, often entirc^ly 

 wanting. 



KEY TO THE SI'ECIES. 



Flowers in terminal, short, crowded racemes, or 2 to A together 

 in (he axils of, or opposite to the heaves. 



Flowers in short, crowded racemes, in pairs in the axils 



of the wide caducous bracts. (Section Nicolsonia.) 

 Flowers 2 to 4 together on long filiform pedicels in the axils 

 of the leaves or opposite to them, more rarely in few- 

 flowered terminal racemes, when they are solitary in the 

 axils of the bracts. (Section Sagotia.) 



Flowers in lax, usually elongated, racemes or panicles. 



Upper sutiireof the pod straight, the lower deeply indented; 

 pod indehiscent. (Section IIeteuoloma.) 

 Bracts rather large and wide, before florescence im- 

 bricate. 

 Bracts small, inconspicuous. 



Stipules more or less connate at the base. 



Articulations of the pod 2; stipe longer than 



tliu calyx. 

 Articulations of the pod numerous; stipe 

 shorter than the calyx. 

 Stipules usually free, only the yoiuiger ones 

 slightly connate. 

 Stipules cordate. 



Stipules oblong-lanceolate or lanceolate. 

 Both sutures of the pod deeply indented, indehiscent. 

 (Section Chalakium,) 

 Pod strongly constricted, more or less tortuous. 



Pod with 2 articulations, superior oiit^'idarged, 



fertile. 

 Pod wath many equal articulations. 



Perennial, erect; stipules oblique-subulate; 

 pod tortuous, at length flattened; articu- 

 lations obicular, flat. 

 Annual flaccid, at length subscandent, rooting 

 at the base; pod very tortuous and lasting 

 Bo; articulations rhomboid-orbicular. 

 Pod slightly constricted at the dissepijurnls, not tor- 

 tuous; articulations oval -linear. 



3. D. ascendens. 



4. D. axillare. 



5. D, mpininn. 



6. D. albijfonfv}. 



7. D, vydlenavvv) 



8. D. molle. 



9. D. iorhtosiivi. 



10. /). spirale. 



11. D. scar pan us 



