BOTANY. 169 
PENTSTEMON PUBESCENS, Soland.; DC. Prodr. 10, p. 327. Western Texas; May. 
CASTILLEJA PURPUREA, Don; DC. Prodr. 10, p. 531. Llano Estacado and Western Texas; 
March, April. 
VERBENACEZ. 
VERBENA BIPINNATIFIDA, Engelm. and Gray, Pl. Lindh. 1, p. 49; Schauer, in DC. Prodr. 11, 
p. 553. Glandularia bipinnatifida, Nutt. Delaware creek to the Colorado; March, April. 
Verbena Ausietia, Linn. Upper Texas, &c.; April. 
VerrBENA BRACTEOSA, Micha. Fl. 2, p. 14. On the Pecos and Llano Estacado; March. 
VERBENA OFFICINALIS, Linn. V. spuria, Linn., etc. Western Texas; April, May. 
LABIATA. 
Satvra FartNosa, Benth. Lab. p. 274. On the Colorado; April. Probably not distinct from 
S. Pitcheri, Zorr. 
SatvrastruM Trexanum, Scheele, in Linnea. 22, p.584. (Plate VI.) Gravelly soils, Llano Es- 
tacado; April. A common plant in Texas and New Mexico. 
ScureLLaRIA REsINOSA, Torr. in Ann. Lyc. New York, 2, p. 232. On the Pecos and the head- 
waters of the Colorado; April. 
Trucrium CANADENSE, Linn.; Benth. in DC. Prodr. 12, p. 581. Near Fort Washita. 
Trucrium Cusense, Linn.; Benth. l. c.; Torr. in Marcy’s Rep. p. 293. On the Pecos, &c.; 
April. 
Monarpa Aristata, Nutt. in Trans. Amer. Phil. Soc. (n. serv.) 5, p. 186. In clayey soil; 
Western Texas. Annual. 
Monarpo mots, Nutt. l.c. Near Fort Washita. Seems to be distinct from M. fistulosa. 
BORAGINACE. 
STEGNOCARPUS, DC. (a section of Conpenta). Calyx deeply 5-cleft ; the lobes lanceolate- 
subovate. Corolla funnel-salverform ; the throat naked; border 5-lobed, flat. Stamens five, 
inserted into the tube of the corolla. Style filiform, terminal, 2-parted: stigmas capitate. 
Ovary ovate, slightly 4-lobed. Fruit globose-quadrangular, depressed, consisting of four closely 
joined nutlets which are even, glabrous, (except a slight hairiness at the summit when young,) 
and at length separate.—A prostrate, much-branched, small under-shrub, canescent with ap- 
pressed hairs. Leaves numerous, small, ovate, and petiolate. Flowers axillary, solitary or 
somewhat clustered, sessile, white. 
S. canescens, Torr. in Emory’s Rep. of Mex. Bound. Commiss. (ined.) Coldenia (sect. Steg- 
nocarpus) canescens, DC. Prodr. 9, p. 559. (Plate VII.) In decomposing gypseous gravel, on 
the Pecos. It is common in the valley of the Rio Grande, from El Paso to Monterey. Dr. 
Edwards found it near the latter place. It is the same as No. 1554-1556 of Wright’s New 
Mexican collection. De Candolle founded the species and subgenus on specimens collected in 
Mexico by Berlandier, and numbered 2256* in his collection. He states that the stamens 
are inserted at the summit of the tube of the corolla, and that the nutlets are silky-pubes- 
cent; whereas we found the stamens inserted near the base of the tube, and the nutlets 
glabrous. We therefore at first supposed our plant to be a distinct species, and called it 8. 
leiocarpa. Having, however, recently obtained original specimens of Berlandier’s No. 2256, 
we found that only the young fruit is a little pubescent near the summit. As to the insertion 
of the filaments, no great reliance is to be placed on that character in this family, owing to the 
tendency to a kind of dioicality that occurs in a number of the genera, such as has long been 
* No. 2389 of Berlandier’s Collection is the same plant- 
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