Plants LindheimerianfB. 229 



153. M. aristata, Nutt. in Benth. Lab. p. 318, in 

 Mem. Amer. Phil. Soc. (n. ser.) V. p. 186. Prairies east of 

 the Brazos. June. 



154. Verbena strigosa, Hook. Compan. to Pot. Mag. 

 I. p. 176. Roadsides, near Houston. April — July. Lower 

 leaves obovate and tapering into a winged petiole, doubly 

 incisely toothed ; the upper tri-multifid. The hispid pubes- 

 cence of the stem is not appressed. The foliage, the more 

 slender spikes, and the much shorter fruit distinguish the 

 species readily from V. stricta. 



155. V. spuria, var. caulibus erectis ; bracteis brevioribus. 

 Dry prairies, Galveston, to the Brazos. March to July. 



156. Zapania nodiflora, Lam. var. foliis lanceolato-cu- 

 neiformibus. Downs of Galveston Island. April. 



157. Dipteracanthus (Panicularia, folia floralia in brac- 

 teas parvas reducta, ideo cyma trichotoma terminalis) nudi- 

 florus (n. sp.) : parce pilosus, demum glabratus ; caule 

 erecto herbaceo ; foliis ovalibus ovato-oblongisve obtusis mar- 

 gine obsolete repandis basi in petiolum attenuatis ; cymulis 

 trifloris in cymam laxam glanduloso-puberulam congestis ; 

 bracteis lineari-lanceolatis pedunculis multo brevioribus ; tubo 

 corollas apicem versus sensim dilatato calycis lacinias atten- 

 uato-subulatas duplo triplove longiore ; capsulis puberulis sub- 

 clavato-cylindraceis vel oblongis utrinque acutis 8— 12-spermis 

 calycem aequantibus. — Open woods at Sim's Bayou, near 

 Houston. May to July. Also, in Drummond's Texan Col- 

 lection, (Coll. 2, No. 221, and 3, No. 257.) Stems one to 

 two feet high, simple or branched from the base, slender, 

 pubescent when young, as well as the leaves and petioles, 

 with scattered hairs. Corolla two inches long. Anthers some- 

 what included ; the lobes slightly mucronate at the base. 

 Stigma a simple lamella, with a mere rudiment of the second 

 lobe. — This well marked species differs from the rest of the 

 genus in its inconspicuous bracts, and naked, more explicate 

 inflorescence, which entitle it to the rank of a distinct sec- 

 tion. 



