26 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
6. Argemone hispida (ray, Pl. Fend]. 5. 1849. 
Described as perennial, stout; stems very pale and of a glaucous cast, densely 
setose-prickly as well assetose; leaves setose and prickly; flowers large, white, nearly 
sessile; capsule pale, rather narrow, oblong, prickly and setose like the stem; style 
short but distinct. 
The following material from Mexico seems to belong here: 
voahuila: At Saltillo, Dr. E. Palmer, 1880 (no, 19) and 1898 (no. 208). 
Type locality: ‘Around Santa Fe,’’ New Mexico. 
Miss Eastwood“ has called attention to the distinctness of this species from the 
so-called A. platyceras of the United States. As is shown elsewhere in this paper, 
the true platyceras is not to be expected in the United States. 
To A. hispida Tam inelined to refer A. squarrosa Greene,’ which came also from 
New Mexico. 
7. Argemone arida Rose, sp. nov. 
Stems branching, pale and somewhat glaucous, with scattered prickles, but not 
hispid; leaves pinnately lobed, the lobes with spiny-tipped teeth; flowers subsessile, 
7 to 8 em. broad, white; sepals with scattered prickles, the horns narrow, ending in 
along prickle; petals rather broad at base; stamens numerous, purplish; ovary and 
capsule very prickly, somewhat glaucous, narrowly oblong, the walls rather firm; 
style very distinct, at least 2 to 3 mm. long. 
Collected by J. N. Rose and Walter Hough on the arid plains about San Luis 
Potosi, Mexico, July 13, 1899 (no, 4864). 
This species is very different from the one described below as ut. platyceras, espe- 
cially in its capsule, style, ete. 
8. Argemone platyceras Link & Otto, Ic. Plant. Rar. Hort. Berol. 1: 85. pl 48. 
1831 (?). 
Stems 5 to 8 dm. high, somewhat diffuse, prickly; leaves pinnately lobed, the 
lobes strongly toothed and spiny-tipped; flower buds in clusters; peduncles even in 
fruit very short; flowers very large, 7 to 15 em. broad, white, sometimes drying yel. 
lowish; sepals bristly, broad, the flat acumination also bristly and ending in a spine 
(not shown in original drawing); stamens purple; fruit ovate-oblong, 3.5 to 4 em. 
long, thin-walled, very prickly; stigmas large, sessile; seeds with coarser reticula- 
tions than in A. mexicana. 
Specimens examined: 
Puebla: Between Tepeaca and Santa Rosa, J. N. Rose, June 27, 1899 (no. 4730). 
Mexico: Near Ozumba, J. N. Rose, July 6, 1901 (no. 5355). 
Federal District: At Ajusce, July 4, 1901 (no. 5306), 
Vera Cruz: Las Vegas, J. N. Rose, May 17 to 22, 1899 (no. 4288). 
Seeds of this species were brought home from Mexico in 1899 (Rose no. 4730), 
and these flowered in July, 1900, and the following notes were made at that time: 
Stems 4 dm. high, erect and simple, only slightly prickly, a little glaucous; the 3 
inner petals much smaller than the outer; stamens reddish; stigmas 4, sessile. 
The type of this species is said to grow ‘‘in Cofre de Perote prope Hacienda de la 
Laguna.”’ Just what is meant by this statement is not clear. The ‘‘ Hacienda de la 
Laguna”’ is near Jalapa, Vera Cruz. A more accurate statement would probably be 
“above Hacienda de la Laguna toward the Cofre de Perote.””. Mr. Pringle and the 
writer collected on the mountains aboye Jalapa, and consequently near the type 
locality, a plant whichseems to answer in all essential particulars to Link and Otto’s 
figure. 
A. platyceras is certainly to be kept distinet from our United States and northern 
Mexican forms. 
aZFoe 4: 4. » Pittonia 4: 68. 
