WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 219 
2. ALLIONIA L. 
Perennial herbs, glabrous or pubescent; leaves opposite, often thick and fleshy, 
green or glaucous, petiolate or sessile; involucre gamophyllous, 5-lobed, enlarged in 
fruit; flowers 1 to 5 in each involucre; perianth white to crimson, short-funnelform 
or campanulate, oblique; stamens 2 to 5; fruit clavate, 5-angled or 5-ribbed. 
KEY TO THE SPECIES. 
Fruit deeply 5-lobed; flowers deep red, often cleistogamous; peri- 
anth deeply lobed or somewhat bilabiate. 
Plants tall, sparingly branched; involucres 3-fruited; flowers 
seldom cleistogamous; leaves linear.............-.----- 1. A. coccinea. 
Plants low, diffusely branched; involucres 1-fruited; flowers 
usually cleistogamous; leaves filiform............------ 2. A. linearifolia 
Jilifolia. 
Fruit 5-angled, not lobed; flowers whitish to purplish red, never 
deep red; perianth shallowly lobed, never bilabiate. 
Leaves narrowly oblong to ovate. : 
Stems hirsute throughout..............2.---. 2 eee ee ee eee 3. A. hirsuta. 
Stems not hirsute. 
All leaves sessile or nearly s0......-.-....------------ 4. A. lanceolata. 
All leaves except the uppermost petiolate. 
Leaves and stems pubescent throughout.......... 5. A. comata, 
Leaves glabrous; stems pubescent only above.... 6. A. melanotri- 
cha. 
Leaves linear or nearly so, 
Plants glabrous throughout or with a few appressed hairs 
on the involucres and pedicels; fruit glabrous. 
Peduncles and involucres glabrous............-------- 7. A. glabra. 
Peduncles and involucres sparingly hairy.....--.-... 7a. A. glabra rece- 
dens. 
Plants copiously pubescent, at least on the branches of the 
inflorescence; fruit pubescent. 
Inflorescence axillary or of few-flowered clusters at the 
ends of the branches. 
Lobes of the involucre obtuse; plants slender, 
erect, little branched.................--.-- 8. A. pinetorum. 
Lobes of the involucre acute; plants stout, spread- 
ing, much branched...............-------- 9. A. bodini. 
Inflorescence paniculate or corymbose, well developed. 
Stems hirsute throughout...............-.-------- 10. A. subhispida, 
Stems glabrous below. 
Stems very stout, simple or sparingly 
branched, erect; leaves very glaucous 
and fleshy, sessile..........-..-.----- 11, A. linearis. 
Stems much branched, slender, not stiffly 
erect; leaves not glaucous or but slight- 
ly so. 
Leaves sessile, thick, pale green; stems 
low, spreading or ascending, dif- 
fusely branched; branches of the 
inflorescence densely viscid-hairy;: 
perianth pinkish.............----- 12. A. diffusa. 
Leaves distinctly petioled, bright green, 
thin; branches of inflorescence 
merely viscid-puberulent; peri- 
anth bright purplish red........-- 13, A. divaricata. 
