288 PROCEEDINGS OF THE AMERICAN ACADEMY. 
no. 26; region of San Luis Potosi, altitude 1,800 to 2,460 m., Parry & 
Palmer, no. 300; hills and plains near Chihuahua, Pringle, no. 274; 
Sonora, south of San Luis, Parry, no. 6; Thurber, nos. 319, 707 ; with- 
out locality, Coulter, no. 196; New Mexico, Fendler, no. 291, Wright, 
no. 1119, Palmer, no, 93; Arizona, Wolf & Rothrock, no. 865; in the 
Huachuca Mountains, Lemmon, no. 2725, at Bisbee, F. E. Lloyd. 
+ + Distinctly annual : stems dichotomously branched: corolla funnelform. 
H. humifusa, Gray. A low annual: stems dichotomously branched, 
hispidulous : leaves linear or the lower oblanceolate, 1 to 1} cm. long, 1 
to 5 mm. broad, mucronate, hispidulous above, margins revolute : stip- 
ules broad, scarious, and setiferous: flowers axillary, rather numerous 
above: calyx-divisions setaceous-subulate, 3 to 4 mm. long: corolla 
open-funnelform, 6 to 7 mm. long; lobes pubescent above: pedicels 
strongly recurved in fruit: capsule depressed-globose, subdidymous. — 
Proc. Am. Acad. iv. 314. Hedyotis (Houstonia) humifusa, Gray, Pl. 
Lindh. ii. 216. — New Mexico, Thurber, no. 292; Texas, Lindheimer, 
nos. 621, 622, 377, 378; E. Hall, no. 286; on sandy prairies near 
Austin, Wright; Belknap, Sutton Hayes, no. 333; Colorado City, Rever- 
chon, no. 60; on sandy hills and plains near Sweetwater, Curtiss, no. 
1140; also specimen cultivated in the Cambridge Botanic Garden in 1849. 
* x « x A low slender leafy stemmed annual, with small white flowers on spread- 
ing axillary pedicels: capsule three fourths inferior. 
H. subviscosa, Gray. A delicate herb, 4 to 15 cm. high: stems 
branched from the base: branches spreading, covered with a subviscid 
hirtellous pubescence: leaves linear-filiform, 5 to 15 mm. long, glabrous 
or hirtellous: stipules short, scarious, minutely setulose-ciliate : pedicels 
filiform, 3 to 8 mm. long, horizontally spreading but scarcely reflexed in 
fruit: calyx hirtellous-pubescent; divisions acute, about 1 mm. long: 
corolla salverform, about 3 mm. long: capsule subdidymous, broader 
than long; seeds open-crateriform, minutely scrobiculate. — Proc. Am 
Acad. iv. 314. — Oldenlandia subviscosa, Wright in Gray, Pl. Wright. 
ii, 68. — Southern Texas, Berlandier, nos. 991, 2421, and Wright, with- 
out number. 
* * * * Slender diffuse herbs, or perennials, 5 to 25 cm. high: stems more or less 
dichotomously branched, often becoming slightly woody below : leaves linear, 
subterete or filiform, shorter than the internodes: pedicels erect or spreading 
in fruit. 
+ Low delicate annuals: calyx adnate nearly to the top of the ovary : capsule 
clavate-turbinate or subglobose. 
H. Brandegeana, Rose. Erect or ascending, 5 to 10 cm. high, 
: ‘freely branching from the base: stems filiform, hispidulous-puberulent: 
