10 TRANSACTIONS OF THE [ocr. 3, 
CACTEA. 
30. Echinocactus setispinus, Engelm. 
UMBELLIFERA, 
80. Bowlesia lobata, Ruiz & Pav. 
82. Apium echinatum (Nutt.), Watson, Bibliog. Index, 
Part 1., 412. 
81. Apium Popei (T. & G.), Gray. 
118. Cherophyllum procumbens (l.), Crantz, var, Teintwriei 
(Hook.), Coulter & Rose. 
120. Daucus pusillus, Michx. 
RUBIACEA. 
85. HoustTonta CRorri#, n. sp. Annual; depresssed-spread - 
ing from a slender, straight root; stems about 25™™ long, 
simple, or dichotomously branching, minutely scabrous ; leaves 
5 to 10™™ long, oblanceolate, tapering into a very short petiole, 
revolute, obtuse; petioles sparingly ciliate; flowers white, 
minute (about 3™™ long), sessile in the axils; fruit didymous, 
2™" high, short-stalked, clothed with short hairs; calyx teeth 
acute, about half the length of the corolla tube. 
A diminutive species in the section of H. humifusa, Gray, 
Syn. Flor. Gamopet., p. 25. 
26. Houstonia angustifolia, Michx. <A branching form. 
76. Galium virgatum, Nutt. A smoothish, thin-leaved form. 
COMPOSIT A. 
53. Hupatorium Greggit, Gray. 
36. Hupatorium incarnatum, Walt. 
21. Liatris punctata, Hook. the var. y of Torrey & Gray, 
having leaves ciliate with rigid hairs. 
54. Gymnosperma corymbosum, DC. - 
55. GUTIERREZIA SAROTHR# (Pursh.). (Solidago Surothre, 
Pursh. Flor. Amer. Sept., ii., 540, 1814; Brachyris Hutham- 
ie, Nutt., Genera, ii., 163, 1818; G. Huthamie, I’. & G.) 
47, HETEROTHECA SUBAXILLARIS (Lam.). (Jnula subacil- 
laris, Lam., Dict. iii., 259, 1789; A. Lamarckii, Cass. 1823.) 
42. Chrysopsis villosa (Pursh.), Nutt., var. canescens (DC.), 
37. Haplopappus spinulosus (Pursh), DC. 
144. Aphanostephus humilis (Benth.), Gray. 
Al. Aster multifiorus, Ait. 
136. Frigeron tenuis, ‘Tl. & G. 
