Desmanthus. LEGUMINOS^. 401 



numerous, linear-elliptical, obscurely veined ; heads solitary or in pairs, on 

 short peduncles ; leii;uinus linear, loiii; and slender, subiilate-altenuaie ;M the 

 apex, armed with ratiier scattered ])rickles, 3-4 times the lentrth ol' tlie pe- 

 duncle ; seeds linear-ohlong. — S. uncinata, Ell. sk. 2. i). loS. (at least in 

 part, ex spec. !) 



With tlie preceding, S. Carolina ! Georgia! TeKas, Drummonfl I — A more 

 slender species than S. uncinata, with smaller and weaker jn-ickles, smaller 

 heads, which are verv frecpientlv geminate, the leaflets not at all reticulated, 

 the subulate and sparsely armed pods about 4 inches long, very slender, the 

 jieduncle usually about an inch in length. — Dr. Pickering seems first to have 

 distinguished tliese two species, having labelled specimens of the preceding, 

 in the "herbarium of the Academy of Natural Sciences, S. reticulata; but a re- 

 ference to Willdenow's work clearly shows that S. uncinata was wholly found- 

 ed on this plant : that author notices the reticulated leaflets, and describes the 

 peduncles as very long, and the fruit densely muricate. De CandoUe has 

 probably confounded the two species, since he states the legumes to be longer 

 than the ])e(hmcles. Perhaps our S. anguslata is the same wiili S. distachya, 

 DC. of New Spain, which is founded on a drawing by JMogino. 



63. DARLINGTONIA. DC. in ann. sci. nat. 18-25, Sf mem. Leg. t. 66. 



Flowers perfect. Calyx camjianulate, 5-toothed. Petals 5, distinct. 

 Stamens 5, distinct: style filiform: stigma miiuite, infundibuliform. Le- 

 gume lanceolate, dry, compressed, mcmbranaceo-coriaceous, 2-valved, 4-6- 

 seeded. Seeds obovate-oval, compressed, with a very slender funiculus. — 

 A perennial nearly glabrous unarmed herb. Stipules setiform. Leaves bi- 

 pinnate; the pinna and leaflets numerous. Flowers white, in axillary pe- 

 dunculate heads ; the legumes capitate or crowded. 



D. hrachyloha (DC. 1. c.) 



a. Illinoe7isi.s : jiinnae 6-11 pairs, with a gland between the lowest pair only ; 

 stems somewhat difTuse ; legumes slightly falcate. — D. brachyloba, DC. ! I. 

 c. \'pro(lr. 2. p. 443. Mimosa lUinoensis, Michaux! fi. 2./. 254. Acacia 

 brachyloba, Willd. spec. 4. j). 1071. 



p. inter media : pinn?B 9-14 i)airs, with a gland hc^^^■een the lowest pair 

 only ; stem stouter, more striate-angled ; legumes as in var. y. — D. interme- 

 dia, Torr. .' in ann. lye. NewYork. 2. p. 181. 



y. glandidosa: pinnae 10-14 pairs, with a gland at the base of each ; stem 

 stout, striate-angled ; legumes falcate, a little narrower, numerous in a dense 

 head. D. o-landulosa, DC! I.e. Mimosa glandulosa, Michx.I I. c. Aca- 

 cia clandulosa, iVdld. I. c. 



Prairies and banks of rivers, a. Illinois! Kentucky & Louisiana! also Florida, 

 Dr. Chapman ! 0. 6c y. South Western States ! to Arkansas ! &. Texas ! 

 Junc-Aug. — Stems 1-3 feet high. Leaflets very small, linear, somewhat 

 mucronale. Legumes an inch or less in length, somewhat intercepted be- 

 tween the seeds, sometimes by abortion 1-2-seeded. — We find no essential 

 difTerence between the more southern form (D. glandulosa, DC.) and D. 

 brachyloba, except that the heads ripen a greater number of pods, which are 

 a little narrower and more falcate than in the latter form, and even tliis charac- 

 ter seems not to be constant. 



64. DESMANTHUS. Willd. spec. 4. p. 1044; Kunth,Mim. etc. p. 115. 



Flowers polygamous (perfect and neutral ) . Cah^x carapanulatc, 5-tootlied. 

 Petals distinct and oblong-spatulate, or sometimes united, occasionally want- 



51 



