OF ARTS AND SCIENCES. 113 
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, 1892 (n. 4318). Resem- 
bling A. arguta, Zucc., in the form and indentation of the leaves, 
but differing in their pubescence and in the inflorescence. Also near 
A, attenuata, Hemsl. (ex char.), but not glandular, and with acute 
by no means rounded leaves. ! 
GeNTIANA Wricuti, Gray. Mr. Pringle’s no. 4237, from moist 
meadows, Nevado de Toluca, 11,000 ft., State of Mexico, September, 
1892, is apparently a low and considerably branched form of this 
species, 4—6 inches in height; while no. 4196, from wet meadows, 
valley of Toluca, is another form nearer the type. 
HALENIA CRAssIuscuLa. Biennial, glabrous, slightly fleshy, 2-4 
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 (n. 4229). 
Harenta Prinever. Glabrous: root biennial: stem single, sim- 
ple or nearly so, slender, erect, a span high: radical leaves 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 5-flowered : pedicels 3 lines in length: sepals oblong, acute, half 
the length of the corolla: corolla white, 4 lines long; spur slender, 
deflexed spreading and curved ascending, about equalling the corolla: 
capsule exserted, acutish. — Springy meadows, Sierra de las Cruces, 
State of Mexico, August, 1892 (n. 4209). 
Krynirzx1a Linirouia, Gray. Mr. Pringle’s no. 4241, from 
muddy hollows of prairies, Flor de Maria, September, 1892, closely 
approaches this species, and has been provisionally referred to it. It 
belongs to the imperfectly known group of South American Krynitz- 
kias with procumbent subfleshy stems and linear opposite somewhat 
connate leaves. 
Russerra suscorracea. Glabrous: stems somewhat ligneous, — 
branched, 4-angled: leaves opposite, very short petioled, ovate, acu- 
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