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. ^4. linearifolia 



filifolia. 

 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 3. A. hirsute. 



Stems not hirsute. 



All leaves sessile or nearly so 4. A . lanceolate. 



All leaves except the uppermost petiolate. 



Leaves and stems pubescent throughout 5. ^4 . annate. 



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 n ce~ 



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. .1. pinetorum. 



Lobes of the involucre acute; plants stout, spread- 

 ing, much branched 9. A. bodiiti. 



Inflorescence paniculate or corymbose, welldevelo] led. 



Steins hirsute throughout 10. A. subkispida. 



Stems glabrous below. 



Shins very stout, simple or sparingly 

 branched, erect; leaves very glaucous 



and fleshy, sessile 11. . I . linearis. 



Stems much branched, slender, aol BtdfBy 

 erect; leaves not glaucous or lnit 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. .1. dijfiua. 



Leave distinctly petioled, brighl green, 

 thin; branches of inflorescence 

 merely viscid-puberulent; peri 

 anth brighl purplish red 13. .1 divaricate. 



