216 Plants Lindheimeriaruz. 



Gray, Fl. 2. p. 41. Var. coiollis minoribus. — Rocky soil 

 on the plateau above New Braunfels. June. 



(621.) Hedyotis (Houstonia) humifusa (n. sp.) : annua, 

 dichotome ramosissima, depressa, glutinoso-puberula ; foliis 

 lineari-lanceolatis imis in petiolum attenuatis mucronatis 

 crassiusculis ; stipulis dilatatis scariosis setaceo-dentatis ; flori- 

 bus in dichotomiis solitariis binisve breviter pedunculatis ; 

 tubo corollas infundibuliformis lobis oblongis supra puberulis 

 sublongiore lacinias calycis 4-partiti subulato-setaceas paulo 

 superantibus ; capsula pendula didyma puberula basi tantum 

 calyci accreta ; seminibus in loculis paucis ovoideis. — Open 

 gravelly banks of streamlets, near Fredericksburg. May. 

 (Also in sandy prairies at Austin, Mr. Charles Wright.) — 

 Stems 3 or 4 inches long, fastigiate, very leafy, in cultivation 

 (in the Cambridge Botanic Garden) close pressed to the 

 ground, and forming a dense patch, flowering through the 

 summer. Lower leaves somewhat spatulate, an inch long ; 

 the others linear and smaller. Corolla pale purple or nearly 

 white, 3 lines long ; the lobes more or less downy inside. 

 Stigma two-lobed. The flowers are dioecio-dimorphous, after 

 the manner of the genus and its allies ; one plant having the 

 linear anthers deeply included, and a long style with the 

 stigma exserted ; the other with a short, included style, and 

 with the stamens inserted in the throat of the corolla. Both 

 forms are abundantly fertile. The seeds are not hollowed on 

 the inner face. — This species is intermediate in characters 

 between Houstonia, Amphiotis, and Ereicotis, and should 

 perhaps stand in a separate section, along with H. rubra, 

 although the latter is in some respects quite a different plant. 

 I was mistaken in stating (in PL Fendl. p. 61), that H. rubra 

 had been met with in Texas. No. 621 is the form with sub- 

 exserted stamens, and short style. 



(622.) The same species with subexserted style and 

 included stamens. Sandy prairies on the Pierdenales. May. 



407. Fedia (Valerianella) stenocarpa (Engelm. 

 Mss.) : fructu glabro anguste oblongo, loculis sterilibus paral- 



