OF ARTS AND SCIENCES. 1 1 3 



slightly surpassed by the straight spreading pedicels, corolla white, 

 globose; filaments hairy at the base: fruit not seen. — Dry rocky 

 hills near Patzcuaro, Michoacan, October, 1 S'.»2 (n. 131 Si. Resem- 

 bling A. arguta, Zncc, in the form and indentation of the leaves, 

 but differing in their pubescence and in the inflorescence. Also Dear 

 A. attenuata, Hemsl. (ex char.), but not glandular, and with acute 

 by no means rounded leaves. 



Gentiana Wrightii, Gray. Mr. Pringle's no. 4237, from mo 

 meadows, Nevado de Toluca, 11,000 ft.. State of Mexico, September, 

 1892, is apparently a low and considerably branched form < f this 

 species, 4-6 inches in height; while no. 4196, from wet meadows, 

 valley of Toluca, is another form nearer the type. 



Halenia crassiuscul a. Biennial, glabrous. Blightly fleshy, 2 I 

 inches in height: stem erect, very narrowly 4-winged, much branched . 

 radical leaves oblanceolate, 3-nerved, petiolate, obtuse, including peti- 

 oles an inch in length: cauline leaves 1-3 pairs, narrowly oblanceolate 

 or oblong, obtuse, narrowed at the base : flowers including spur 6 lines 

 long, densely aggregated at the ends of the stems and branches : calyx 

 segments linear-oblong, obtuse, about half the length of the white 

 corolla; spurs slender, spreading, and curved upwards; flowers after 

 anthesis slightly nodding, not at all resupinate : capsules exserted, 

 acute, 4 lines in length. — Bare alpine summits, Nevado de Toluca, 

 14,000 ft., September, 1892 (u. 4229). 



Halenia Pringlei. Glabrous : root biennial : stem single, sim- 

 ple or nearly so, slender, erect, a span high : radical have-, narrowly 

 oblanceolate, 1-nerved, attenuate below to a slender petiole; the cau- 

 line 1-2 pairs, short, lance-linear: umbellate cymes usually 3; the 

 lateral from near the middle of the stem, about 3-flowered, the terminal 

 about o-flowered: pedicels 3 lines in length : sepals oblong, acute, half 

 the length of the corolla: corolla white. I lines long; spur slender, 

 deflexed spreading and curved ascending, about equalling the corolla: 

 capsule exserted, acutish. —Springy meadows. Sierra de la- < '■ 

 State of Mexico, August, 1892 (n. 4209). 



Krtnitzkia linifolia, Gray. Mr. Pringle's no. 1241, from 

 muddy hollows of prairies, Flor de Maria, September. 1892, do 

 approaches this species, and has been provisionally referred to it. It 

 belongs to the imperfectly known group of South American Krynil 

 kias with procumbent subfleshy stems and linear opposite BomewhaJ 



connate leaves. 



Rtjsselia subcoriacea. Glabrous: stems somewhat ligni 

 branched, 4-angled : leaves opposite, very short petioled, ovate, iCU 



vol. xxvin. (y. s. xx.) 



