WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 499 
KEY TO THE SPECIES. 
Plants low, less than 15 cm. high; flowers small, the corolla lobes 
much shorter than the tube; anthers oblong................. 1. C. texense. 
Plants larger, usually more than 20 cm. high; flowers large, the 
corolla lobes only slightly shorter than the tube; anthers 
linear. . 2.2.2. ee ee eee eee eee eee eee 2. C. calycosum. 
1. Centaurium texense (Griseb.) Fernald, Rhodora 10: 54. 1908. 
Erythraea texensis Griseb. in DC. Prodr. 9: 58. 1845. 
Type Locauity: “In rep. Texas pr. 8. Felipe.’’ 
Rance: Texas to southeastern New Mexico. 
New Mexico: White Sands (Wooton & Standley). Lower Sonoran Zone. 
2. Centaurium calycosum (Buckl.) Fernald, Rhodora 10: 54. 1908. 
Erythraea calycosa Buckl. Proc. Acad. Phila 1862: 7. 1863. 
Type Locauitry: North of Fort Mason, Texas. 
Rance: Texas to Arizona. 
New Mexico: Carrizo Mountains; Farmington; Gila Hot Springs; Mesilla Valley. 
Wet ground, in the Lower and Upper Sonoran zones. 
A plant with white flowers was collected at Mesquite Lake (Wooton & Standley 
3933). 
2. EUSTOMA Salisb. 
Glaucous perennial, often 60 cm. high, with opposite entire sessile clasping thick 
leaves and large bluish flowers; calyx 5-parted (rarely 6-parted), with narrow keeled 
lobes; corolla campanulate-funnelform, with deeply 5 or 6-lobed limb; anthers 
oblong, versatile, recurved in age; ovary 1-celled, the ovules numerous. 
1. Eustoma russellianum (Hook.) Griseb. in DC. Prodr. 9: 51. 1845. 
Lisianthus glaucifolius Jacq. err. det. Nutt. Trans. Amer. Phil. Soc. n. ser. 5: 197. 
1837. 
Lisianthus russellianus Hook. Curtis’s Bot. Mag. 65: pl. 3626. 1839. 
Tyre Locauity: ‘‘On the sandy banks of the Great Salt River of Arkansas.’’ 
Rance: Nebraska and Colorado to New Mexico and Louisiana; also in Mexico. 
New Mexico: Sabinal; Shalam; White Sands; Tularosa Creek; Roswell. Alkaline 
soil, in the Lower Sonoran Zone. 
A form with white flowers is common about the White Sands. 
8. HALENIA Borkh. 
Low annual, 10 to 20 cm. high, with linear opposite leaves and loose cymes of small 
yellow 4-merous flowers; sepals linear-lanceolate; corolla 8 to 10 mm. long, the lobes 
ovate; spurs divaricate-ascending, shorter than the corolla. 
1. Halenia rothrockii A. Gray, Proc. Amer. Acad. 11: 84. 1876. 
Type Locauity: Mount Graham, Arizona. 
RANGE: Southern Arizona and New Mexico to Mexico. 
New Mexico: Mogollon Mountains (Rusby 264). 
4. FRASERA Walt. Derer’s Ears.! 
Biennial or perennial herbs with tall erect hollow stems and entire, opposite or 
verticillate leaves; flowers numerous, in paniculate or thyrsoid cymes; calyx 4-lobed, 
the lobes narrow; corolla rotate, dull whitish or yellowish, with 4 lobes and 1 or 2 
fringed nectariferous glands; stamens 4, adnate to the throat of the corolla; filaments 
distinct, or united at the base, the anthers versatile; ovary 1-celled, 2-valved; capsule 
ovoid, leathery, often flattened; seeds flattened, margined or winged. 
1A translation of the Navaho name. 
