586 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM 
which perhaps led Bentham to describe the calyx lip of C. rostrata as “ suben- 
tire,” but in the type of this it is clearly 3-lobed. 
Bentham also contrasted C. villosa and C. rostrata, stating that the keel was 
slightly twisted in the former but not so in the latter. I have been unable 
to escape the conclusion, from many examinations, that this difference is due 
to the age of the flowers, and is not specific. In a young flower the keel is 
usually not twisted. 
So far as pubescence is concerned, every gradation can be found from 
glabrous or nearly glabrous to densely short-pubescent or to tomentulose, both 
on the calyx and on the lower leaf surfaces. Indeed, a series of specimens 
may be selected all with the leaflets densely pubescent beneath, but in this 
series the calyx will vary from glabrous to densely strigillose or to tomentulose. 
On the other hand, a series of specimens with the calyx glabrous or nearly so 
will show all. variations as regards the pubescence on the leaflets. In short, 
there is no correlation as regards the pubescence of calyx and leaflets, nor has 
any been detected with other variable organs. 
CoAHUILA: Caracol Mountains, Palmer 259 (U. S., Kew). 
Nuevo Le6N: Monterrey, Edwards (Kew). Nuevo Leén, Pringle 2274 
(Gray). Sierra Madre near Monterrey, Pringle 2506 (U. S., Kew). 
TAMAULIPAS: G6mez Farias, Palmer 268 (U. S.). Tampico, Palmer 
167 (U. 8.). 
SInaALoa: San Ignacio, Montes ¢ Salazar 29, 704, 744 (U. S.). 
DvuRANGO: Durango, Rose 2320 (U. 8.). 
ZACATECAS : Colotlin to Bolafios, Rose 2839 (U. S.). Monte Escobedo, Rose 
2632 (U. S.). Bolafios to Guadalajara, Rose 3042 (U.S.). 
San Luis Potosf: Pelote, Purpus 4851 (U. 8.). Bagre, Purpus 5208 (U. 8.). 
JALisco: Guadalajara, Pringle 2118 (Gray); Rose & Painter 7367 (U. 8.); 
Berlandier (Kew); Rose & Hay 6401 (U. 8.). Etzatlin, Rose & Painter 
7523 (U. S.). Rfo Blanco, Palmer 162 (U. S.). Chapala, Rose ¢& Hay 7659 
(U. 8.). 
TUANAJUATO: Guanajuato, Dugés, August, 1895 (Gray).. 
Hiparco: Zimapfin, Beechey (Kew) ; Coulter (Kew). 
VERACRUZ: Valley of C6rdoba, Bourgeau 1857 (Gray), 1895 (U. 8.), 1855, 
1587 (Kew). Orizaba, Bourgeau 2802 (Kew), 2916 (Gray); Botteri 970, 374 
(Gray), 118, 1152 (U. 8.), 728, 1153 (Kew). Veracruz to Orizaba, Miiller 
1811 (Kew). Jalapa, Rose € Hay 6129 (U. S.). Hacienda Mirador, Nelson 
90 (U. 8.). Rio Blanco, near Orizaba, Bourgeau 2675 (Kew). Veracruz, 
Galeotti 3273 (Kew), type of Wenderothia pilosa. Mirador, Linden 723 (Kew). 
Huatusco, Liebmann 5254 (U. S.). Wartenburg, Ervendberg in 1858 (U. S.). 
MicHoacAn: Morelia, Arséne 2760 (Gray) : Galeotti 3367 (Kew). Mt. Santa 
Helena, Langlassé 65 (U. 8.). Sierra Madre, Langlassé, February, 1899 
(U. S.). 
GUERRERO: Acapulco, Palmer 575 (U. S§.). 
Mexico: Tlalpam, Rose ¢ Hough 4531 (U. S.). Ocuilfin, Salazar, November 
16, 1911 (U. 8.). 
Pursia: Tehuacin, Rose € Hay 5904, 9944 (U. S.). 
MoreLos: Cuautla, Holway 11 (U. 8.). Cuernavaca, Rose & Hay 6856 
(U. 8.) ; Bowrgeau 1377 (Kew) ; Rose & Painter 6903 (U. S.). 
Oaxaca: San Felipe del Agua, Conzaitti 590 (U. S.). Oaxaca, Nelson 1224 
(U. 8.) ; Conzatti 1677 (U. 8.) ; Conzatti € Gonzdlez 43 (U. 8.) ; Purpus 2679 
(U. 8.). Monte Albfn, near Oaxaca, Rose & Hough 4575 (U. 8.). 
Curapas: Tonalé, Nelson 238 (U. S.). San Cristébal to Teopisea, Nelson 
3471 (U. S.). Tumbala, Nelson 3349 (U. S.). El Carmen, Doyle 243 (U. 8.). 
Solosuchiapa, Doyle 246 (U. 8.). 
