Planta Lindheimeriancs. 247 



346. Galium virgatum, Nutt. Prairies. April. 



247. Diodia tricocca, Torr. &r Gr. Fl. II. p. 30. Fertile 

 places in the prairie, sixteen miles west of San Felipe. (Also 

 collected by Dr. Wright.) June. Caespitose, depressed, and 

 very much branched. All the specimens examined are tri- 

 carpellary. 



248. Spigelia Texana, A. DC. Prodr.lX. p. 5. (Coelos- 

 tylis, Torr. fy Gr.) Shady woods along the Mill-creek west 

 of San Felipe. July. 



249. Aster Drummondii, Lindl. Shady, moist woods 

 and thickets. September — October. This species exhibits 

 many varieties, in respect to pubescence, and smoothness or 

 roughness. Among them the A. urophyllus and A. hirtellus 

 of Lindley, are probably to be identified. 



250. Ch-etopappa asteroides, DC. Dry prairies. April 

 to July. 



petalis (40-50) lineari-oblongis margine fimbriato laceris apice bifidis aristatis ; 

 staminibus numerosissimis aequalibus inclusis e toto tubo ortis stylo compresso 

 brevioribus ; stigmate irregulariter 14-17-fido. — On deserted ant-hills, near the 

 Colorado River. Often a foot in diameter: our specimens are eight or nine inches 

 in diameter, and four or five inches high. Spines strongly annulate, stout, the 

 larger ones often two inches long. Flowers about two inches in length, twelve or 

 more aggregated in the woolly centre. The petals at the base are scarlet, verging 

 to orange, from which a pale purple or violet midrib extends to the apex, and is pro- 

 longed into a delicate bristle of the same color, while the upper part of the petal is 

 pearly white, with feathery margins. The flowers remain for three days, expanding 

 only in bright sunshine. 



7. Cereus c^espitosus (??. sp.) : ovato-globosus demum cylindricus, apice de- 

 presso-umbilicatus ; costis sub-15 e tuberculis confluentibus ortis rectis ; aculeis 

 numerosis ex areola oblonga albo-tomentosa demum glabrata radiatis nunc recurvis, 

 lateralibus longionbus ; floribus exaxillis tuberculorum anni prioris lateralibus ; ova- 

 rio oblongo tuberculis e lana villosa spinigeris stipato; sepalis 40-50 apice spinis 

 setiformibus villoque coronatis virescentibus, intimis lanceolatis acuminato-aristatis 

 glabris coloratis ; petalis 30-40 apicem versus cilialo-denticulalis, exteriorihus subito 

 acuminatis, interioribus obtusis cuspidatis ; staminibus inclusis stylo brevioribus ; 

 stigmate viridi infundibuliformi 13-partito. — Gravelly soil, near Cat-Spring, west 

 of San Felipe. A singular reduced Cereus, quite caespitose, and even proliferous 

 occasionally, in the manner of Opuntia, beginning to flower when only two inches 

 high, and scarcely taller than broad, but attaining the height of at least six inches ; 

 the ribs from twelve to seventeen. It is in flower for two days ; the flowers about 

 two inches broad when fully expanded. Petals rose-purple. Filaments reddish at 

 the base, yellow at the summit." Engel.' 



