176 Plante Lindheimeriane. 
instead of a subulate stipel, on the rachis at the insertion of 
each leaflet.! 
(596.) AsrracaLus caryocarpus, Ker, Bot. Reg. t. 176; 
Torr. & Gray, Fl. 1. p. 331. Clayey soil, near Victoria. 
February, in flower. Also (598) in Western Texas, in flower 
and fruit. 
(597.) A. Mexicanus, Alph. DC. Pl. Rar. Hort. Genev. 
not. 5. p.17.t. 3. A. trichocalyx, Nutt. in Torr. & Gray, 
Fl.l.c. Prairies on the Lower Guadaloupe, west of Victoria. 
February, in flower. — This and the last species, although 
often confounded in herbaria, are manifestly distinct in the 
living state. A. caryocarpus has more strigose and somewhat 
canescent, oblong or linear-oblong leafiets, close and fine 
hairs on the calyx, sometimes blackish, a violet purple corolla, 
the flower about two thirds of an inch long, and ovate pointed 
legumes, which are seldom more than two thirds of an inch 
in diameter. A. Mexicanus is a larger plant in all its parts, 
with smoother and greener foliage; the leaflets varying from 
roundish-obovate to oblong; the flowers an inch long; the 
calyx villous, (often very densely) with soft, white hairs; the 
corolla barely tinged above with pale violet, or nearly white ; 
and the very turgid globose-ovoid legumes are obtuse and 
over an inch in diameter.’ | 
1 Petalostemon virgatum, Scheele in Linnea, 21, p. 461, is plainly the No. 42, Pl. 
Lindh. and No. 137, Pl. Fendl., viz. a pubescent variety of P. violaceum, perhaps 
connecting that species with P. decumbens. The leaves in some specimens are in- 
deed 7-foliolate, in others both 5-foliolate and 3-foliolate.— Trifolium Reemerianum, 
Scheele, 1. c. is manifestly the T. amphianthum, Torr. § Gray, FV. 1. p. 316. 
2 This Texan plant is clearly De Candolle’s A. Mexicanus; but Dr. Engelmann 
thinks it distinct from the A. trichocalyx, of Missouri; on account of the still larger 
and pale purple flowers, and shorter calyx-teeth. The remarks above are chiefly 
founded on living plants of A. trichocalyx and A. caryocarpus, raised from seeds 
furnished by Dr. Engelmann from St. Louis. 
Mr. Wright has communicated specimens of a new Texan species of Astragalus, 
and also seeds from which the plant has been raised, during the past summer in the 
Cambridge Botanic Garden. 
AstTraGALUs WRiGHTII (sp. nov.): annuus, pumilus, hirsuto-canescens; caule 
subsimplici ; stipulis subulatis liberis ; foliolis 3- 5-jugis oblongis acutiusculis; pedun- 
culis folio longioribus paucifloris; floribus capitatis; calyce hirsutissimo, lobis lineari- 
subulatis attenuatis corollam violaceam superantibus Jegumine oblongo hirsuto sub- 
tereti fere biloculari 6-4-spermo dimidio brevioribus.— Texas, near Austin, Mr. - 
