WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 528 
KEY TO THE SPECIES. 
Leaves alternate, rigid, spinescent. .............----------++-+-+- 1. L. brevifolium. 
Leaves opposite, neither rigid nor spinescent.............---+-++++ 2. L. nuttallir. 
1. Leptodactylon brevifolium Rydb. Bull. Torrey Club 40: 474. 1913. 
TypE LocALity: Juniper Range, Utah. 
Rance: Washington and Nevada to Colorado and New Mexico. 
New Mexico: Cedar Hill; near Ojo Caliente. Dry hills and plains, in the Upper 
Sonoran Zone. 
2. Leptodactylon nuttallii (A. Gray) Rydb. Colo. Agr. Exp. Sta, Bull. 100: 279. 
1906. 
Gilia nuttallii A. Gray, Proc. Amer. Acad. 8: 267. 1870. 
Type Locautty: “Rocky Mountains of Colorado and Utah to the Sierra Nevada in 
California.”’ 
Rance: Washington and California to Wyoming and New Mexico. 
New Mexico: Ramah; Burro Mountains; Mogollon Mountains; White Mountains. 
Mountains, in the Transition Zone. 
Most of our specimens are considerably taller and more slender than the typical 
form, and are inclined to be woody throughout. 
5. MICROSTERIS Greene. 
Slender annual with mostly alternate leaves and small, loosely cymose or scat- 
tered, purplish flowers; calyx at length ruptured by the capsule; corolla salvertorm, 
with a narrow throat; seeds mucilaginous when wetted, without spiracles. 
1. Microsteris micrantha (Kellogg) Greene, Pittonia 3: 303. 1898. 
Collomia micrantha Kellogg, Proc. Calif. Acad. 3: 18. 1863. 
Tyre Locauity: ‘‘ Vicinity of Silver City, Nevada Territory.” 
Range: Nebraska and Wyoming to California and New Mexico. 
New Mexico: Sandia Mountains; Tierra Amarilla. Open slopes, in the Transi- 
tion Zone. 
6. PHLOX L. Putox. 
Perennial herbs, 30 or 40 cm. high or less, the base of the stem often woody, with 
opposite sessile leaves and cymose flowers with showy corollas; calyx narrow, scari- 
ous between the lobes; corolla salverform, constricted in the throat; stamens une- 
qually inserted, included; capsules ovoid, ultimately rupturing the persistent calyx. 
KEY TO THE SPECIES. 
Plants densely cespitose, forming thick mats; leaves more or less 
fascicled. 
Leaves with many cobwebby hairs, not glandular-ciliate; plant 
of low dry hills............-.-------- eee eee ee eee eters 1, P. canescens. 
Leaves glandular-ciliate, without cobwebby hairs; plant of al- 
pine meadowS........-.+-----22-eeee eee e ec eeceeeeees 2. P. caespitosa, 
Plants not cespitose, loose, erect; leaves not fascicled. 
Tube of the corolla fully twice as long as the calyx. 
Calyx 13 to 14 mm. long; leaves long, 20 to 40 mm., linear 
or nearly 80......-----2.- 2-2-2 eee ee eee eee eee eee 3. P.stansburyt. 
Calyx less than 10 mm. long; leaves short, 10 to 20 mm., 
linear-lanceolate.....-....-..-----------2eee eee rere 4, P. grayt. 
Tube of the corolla considerably less than twice as long as the 
calyx. 
