58 BOTANY OF DR. A. WISLIZENUS’S EXPEDITION, 
About Saltillo Echinocactus Texensis, Hpfr. (EZ. Lindhetmeri, Engelm., in Plant. Lindh. 1. ¢.) was 
found, which extends from here to Matamoros, and to the Guadaloupe and Colorado, in Texas, 
The pretty Mamillaria strobiliformis® grows on rocks near Rinconada. Hunne- 
mannia fumariefolia, Sweet, was collected near Saltillo, with smaller flowers (14 inch [114 (30)] 
in diameter), and near Rinconada, with larger ones (3 inches in diameter) ; an interesting 
plant, the eastern representative of the Californian Eschscholtzia, but perennial, with a small torus, a 
different stigma, etc. 
I cannot omit to introduce here a beautiful shrub discovered on the rocks about Agua Nueva 
and Buena Vista by Dr. Gregg. Depending upon Don’s characters of Cowania as correct, 1 must 
consider this plant as the type of a new genus, which I have great pleasure to dedicate to its inde- 
fatigable discoverer, my friend Dr. Josiah "Greg eg, whose name has already been frequently mentioned 
in these pages.) Greggia rupestris is a lovely, sweet-scented shrub, with flowers resembling roses in 
shape and color, so that Dr. Gregg was induced to name it the “ Cliff rose.” 
North and northeast of Monterey we reach the lower country, and with it a different vegetation ; 
here is the home of the shrubby Casstew (Parkinsonia, Casparea, etc.), and Mimosee ; Sophora, 
Diospyros, some species of Rhus and Rhamnus are common here, as well as a climbing yellow- 
flowered Hirawa, while another erect red-flowered species grows on the table-lands near Parras. 
One of the most beautiful shrubs of that district is Leucophyllum Texanum, Benth., with its whitish 
tomentose leaves and sweet-scented blue flowers. It is common from San Antonio, in Texas, to Mon-. 
clova, and from Cerralbo to Camargo, but is not seen on the table-lands. 
Vitis bipinnata and V. incisa, well known in the southwestern parts of the United [115-(81)] 
States and Texas, were also found here. Remarkable herbaceous plants were a Nicotiana, 
an Orobanche (on the sea-coast), an ustoma, several Asclepiadacee, Malvacee, Cucurbitacee, 
biate, and others. Lobelia phyllostachya has already been mentioned above. (See note 41.) 
Hasty and imperfect as this notice of the collections of Dr. Wislizenus is, it cannot but impress 
the botanist with the richness and novelty of the flora of these countries, and invite the arduous 
explorer to further exertions. 
Sr. Louis, December, 1847. 
5° MAMILLARIA STROBILIFORMIS, n. sp.: simplex ovato-conica, tuberculis imbricato-adpressis, conicis, applanatis, 
sulcatis; aculeis rectis radialibus, sub-10 albidis, centralibus 3 fusco-atris, 2 minoribus sursum versis, singulo longiore 
porrecto; floribus in vertice lanato centralibus, ovario lanoso; sepalis sub-10 lanceolatis, acutis, integris; petalis sub-24 
ovato-lanceolatis, mucronatis, integris vel versus apicem erosis; stigmatibus 7 flavis erecto-patentibus exsertis. 
Rinconada, on rocks; flowers in June. About 3 inches high, and 2 inches in diameter below; tubercles in 10 to 
13 oblique rows closely adpressed, so as to give the whole plant the appearance of a pineapple or cone, pores in 
the groove and the axils, about 6 lines long; radial spines 3 to 5, central 5 to 8 lines long; flowers central, 3 to 5 in a 
cluster together imbedded in long and dense wool, about 15 lines long and wide; petals deep purple. 
5! Greqata, n. gen. (Greggia, Gertn. = Eugenia, Mich., fide Endlicher). Calyx tubulosus, 5-lobus, imbricatus; 
petala 5 calycis fauci inserta; stamina numerosissima cum petals inserta; ovaria plura fundo calycis inserta 1-, rarius 
2-ovulata; stylus villosus, Mieituins, stigma nudum ; ovulum supra basin ovarii placentz laterali insertum, anatropum; 
achenia villosa, ecaudata; semen unicum, erectum, embryo radicula infera. 
A Mexican shrub with small cuneate truncate dentate leaves with adnate stipules, and solitary rose-colored or 
purple sweet-scented flowers. 
GREGGIA RUPESTRIS, n.sp. Cliffs about Saltillo, Buena Vista, and Agua Nueva, flowers January to March; several 
feet high, much branched, leaves about 6 lines long, and at the apex 3 lines wide, crowded; revolute on the margin, 
glabrous above, tomentose beneath ; flowers Sermiual on short branchlets 15 to 18 lines in diameter. Nearly related 
to Cowania, but distinguished by the imbricate, not valvate calyx, the red, not yellow flowers, and the deciduous, not 
persistent style, 
rep 26% hi Pa ITT CESS RET EER MEE Oe ee se i io 
