1921] NATURAL SCIENCES OF PHILADELPHIA. 481 



1. Verbascum thapsus L. 



Old fields, roadsides and thickets. Seen from Louisiana and east- 

 ern Texas, probably frequent throughout our area. Naturalized 

 from Eurasia. 



14. LEUCOPHYLLUM Humboldt and Bonpland. 

 Leucophyllum H. & B., PI. Aequin. 2: 95. 1809. 

 Type species, L. ambiguum H. & B., of Mexico. 



1. Leucophyllum texanum Benth. 



Leucophyllutn texanum Benth. in DC. Prod. 10: 344. 1846. " Juxta Laredo prov.- 

 Texas (Berlandier!) ... (v. s. coram, a cl. Hook.") Probable isotype, 

 Berlandier 2070 (labeled "2070-660"), collected "cerca Laredo, Junio, 

 1829," seen in Herb, of Columbia University at the New York Botanical 

 Garden. 



Corolla 18-20 cm. long, larger than, and leaves not semi-petioled 

 as are those of the other species, L. ambiguum H. & B. of central 

 Mexico and L. minus Gray of Trans-Pecos Texas and Chihuahua. 

 Also the leaves and branchlets are in amhiguum more densely tomen- 

 tose with much more widely branching hairs, in minus closely 

 stellate pubescent with scarcely stalked hairs. L. minus is to be 

 looked for in the western Edwards Plateau. 



Corolla "rose-colored with lavender tinge," on anterior side 

 ''from base to mouth having a white ground with orange-colored 

 splotches in four or five lines." Flowering, southward nearly 

 throughout year, northward from June to September, and soon 

 ripening fruit. 



Hills and plains, limestone bluffs, from Austin, Travis and Gil- 

 lespie counties, Texas, southward, increasing and becoming a char- 

 acteristic chaparral shrub near the Rio Grande. Ranges southward 

 through Nuevo Leon and Coahuila. 



Texas. Austin: San Fehpe, Mexican Boundary Survey (Y). 

 Cameron: Rio Hondo, Chandler 7023 (Y). Duval: San Diego, 

 Croft 50 (Y). Gillespie: Threadgill, Jermy 446 (U). Hidalgo: 

 Hidalgo, Pringle 1957 (A, Y); Mission. Nueces: Corpus Christie 

 Heller (Y). Travis: Austin, Pennell 10450 (Y), Tharp (T, Y). 

 Uvalde: Sabinal, Reverchon 1572 (P, U, Y); Uvalde. Webb: 

 Laredo, Berlandier 2070 (Y). 



15. PENSTEMON (Mitchell) Schmidel. 



Penstemon Schmidel, Icon. PI. 2. 1762. 



Type species, Chelone pentstemon L., of Virginia. 



A. Anther-cells divaricate, opening throughout. Leaves mem- 

 branous or somewhat fleshy, the lower petioled (in P. amhiguus 

 linear), and all the cauline leaves deciduous. 



