86 PROCEEDINGS OF THE AMERICAN ACADEMY. 
red oblong marginal glands (very rarely a few glands scattered on the 
lower side of the leaf): heads a little longer than in the type: awns 
2 mm. long: akenes 6 or 7 mm. long. — P. punetata, Wats. Proc. Am. 
Acad. xxiv. 58, not Jacq. —In shaded ravines and on mountain bluffs, 
Southern Arizona to the Sonora coast. ARIZONA (Palmer, 1867, no. 129), 
Tuscan (Smart, no. 3882), Santa Catalina (Lemmon, no. 8031), Malpais 
Mts. (Pringle); Sonora, Guaymas (Palmer, 1887, no. 224). 
* %* Rigid glaucous perennial with ligneous root: leaves entirely without set#: 
ppus various, erect, not divergent, the aristiform 
pales, when present, generally minutely serrulate. 
P. imberbis, Gray. Stems sulcate, 3 to 9 dm. high, paniculately 
branched, sparingly leafy and junciform: leaves thick, linear, with revo 
lute margins, the longest 6 or 7 cm. long, channelled above, and with the 
midrib very prominent. beneath; lower surfaces with two rows of scat 
tered elongated dark glands: peduncles about 2 em. long, with a few 
linear-subulate bracts, especially toward the tips: involucre cylindrical, 7 
or 8 mm. high, 10-12-flowered, of 5 or 6 linear blunt soon involute bene 
marked with linear dark glands: disk-corollas with five longitudinal 
purplish stripes along the tube and with a conspicuous dark gland at ~ 
tip of each lobe; rays with or without one or two small glandular dots: 
akenes puberulent, 5 or 6 mm. long.— Pl. Wright. ii. 70 & in 407 
Bot. Mex. Bound. 73; Rothrock in Wheeler Rep. vi. 172. — Southern 
Arizona and adjacent Mexico. Arizona, near Fort Huachuca (hee 
mon, no. 2783) ; Sonora, Sonoyta Valley (Wright, no. 1399, Rothrock, 
no. 636). CHrHuaHua, Janos (Schott). Said to have a strong tere- 
binthine odor. 
Il. — SOME RARE AND UNDESCRIBED PLANTS COL | 
LECTED BY DR. EDWARD PALMER, AT ACAPULCO, 
MEXICO. 
ScLeRIA LITHOSPERMA, Willd., var. FILIFORMIS, Britton, Ann. N. ” 
Acad. Sc. iii. 231. Forming tussocks among underbrush on hills gel 
Acapulco, November, 1894 (no. 76). Common in South Florida all 
the West Indies, the type occurring in Southern Asia and Australia. | 
Ruprechtia fusca. A tree about 4} m. high, the trunk 2 ¢™ 
in diameter: bark of the slender branches pale brown, puberulent ° 
glabrate, somewhat sulcate and verrucose: ochrz cylindric, puberulent, 
7 mm. long, soon deciduous : leaves obovate, 5 to 9cm. long, 2} to 4} cm. 
broad, coriaceous, on thickish petioles 3 to 6 mm. long, below subcuneate; — 
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