Plant ce Lindheimeriana. 243 



bony almond-shaped putamen, derived, we suppose, from the 

 endocarp or lining of the carpel, though, for the want of young 

 pods, we are unable to trace its formation. But in the ripe 

 legume, these several husks, which are perfectly closed, are 

 entirely unconnected with each other. They are placed 

 obliquely in the pod, of which they occupy nearly the whole 

 breadth. The flattened, oval seeds (about 3 lines long) do 

 not fill the cavity. On examining an Algarobo pod from 

 South America (the fruit, as we ptesume, of A. dulcis,) we 

 find that the seeds are invested by a similar covering, only 

 that it is much thinner and paper-like, and apparently does not 

 separate spontaneously from the pulp. We have not seen the 

 fruit of Prosopis spicigera ; but we hope that this character 

 may help to sustain the genus Algarobia, which, after having 

 been separated from Prosopis by Mr. Bentham, has since, by 

 the same author, been again reduced to a section of that genus. 

 Our own species, however, would still have to be distinguished 

 subgenerically from the typical Algarobia thus. $ Pleopy- 

 rena. Legumen lineare, subteres, torosum, polyspermum ; 

 seminibus singulis in nucleo endocarpico coriaceo inter pulpam 

 nidulante clausis. — In a species of Strombocarpa, collected 

 by Capt. Fremont, (the curious fruit of which should separate 

 it generically from Algarobia,) this papery lining is continuous, 

 or merely collapsed where the seeds are deficient. 



234. SCHRANKIA ANGUSTATA, Toil'. &f Gl\ I. C. May 



August. 



235. Desmanthus brachylobus, Benth. (Darlingtonia, 

 DC); the var. glandulosa, Torr. fy Gr. under Darlingtonia; 

 — fruiting specimens, collected in July. 



236. Prunus glandulosa, Hook. ; Torr. fy Gr. I. c. 

 " Low shrubs on sandy hills west of the Brazos, flowering in 

 February. Fruit yellowish-red, as large as a middle-sized cher- 

 ry." Lindheimer. It is probably a Prunus, therefore, but 

 the half-grown fruit upon one of our specimens is juiceless, 

 and still clothed with the tomentum of the ovary. 



237. P. gracilis (n. sp.) : ramis subinermibus ; foliis Ian- 



