DISTRIBUTION OF ADENOSTEGIA 401 
calyx one- to two-leaved, lower leaf, when present, saccate at the 
base, upper leaf erect, winged at the base except in the section 
Chloropyron; corolla cylindrical, bilabiate, the lips nearly equal 
except in A. laxiflora; upper lip enclosing stamens and pistil, 
lower lip obscurely three-crenulate or entire, more or less saccate; 
stamens two or four, in unequal pairs, the anthers one- or two- 
celled, the lower cell, when perfect, subtending the upper, filaments 
generally hairy; capsule flattened, lanceolate or slightly rounded; 
seed irregular, more or less reticulate. 
Key to sections 
Lower lip of the corolla one-half the length of the upper lip. I. ANISOCHEILA. — 
Lower lip of corolla equalling upper lip. 
Tube of the corolla one fifth the length of the throat. If, PRINGLEA. 
Tube of corolla more than one fifth the length of the throat. 
Calyx diphyllous. III. EUADENOSTEGIA, 
Calyx-leaf cxnalliie corolla. 
Inflorescence capitate. IV. KINcIA, 
Inflorescence spicate. VI. CHLOROPYRON 
Calyx leaf one half the length of the corolla. V. Dicemnerik. 
Section I. ANISOCHEILA 
Cordylanthus § Adenostegia (in part) Gray, Proc. Am. Acad. 7: 
381. 1868; Wats. Bot. King’s Exped. 459. 
Cordylanthus § Anisocheila Gray, Syn. Fl. 2': 303. 1886. 
Adenostegia § Anisocheila Wettstein in Engler & Prantl, Nat. 
Pflanzenfam. 4: 98. 1891. 
Flowers scattered along the stems; calyx diphyllous, upper lip 
of corolla twice as long as lower; anthers one-celled or with vestige 
of second cell. 
1. ADENOSTEGIA LAXIFLORA (Gray) Greene 
Cordylanthus laxiflorus Gray, Bot. Mex. Bound. 2: 120. 1859; 
Gray, Proc. Am. Acad. 7: - Wats. Bot. King’s Exped. 
232, 460; Gray, Syn. FI. 2!: 
Adenostegia laxiflora Greene, ba 2: 181. 1891; Kuntze, 
Rev. Gen. 2: 457; Wettstein in Engler & Prantl, Nat. 
Pflanzenfam. 4%: 98. 
Paniculately branching annual, 3-4 dm. high, pubescent 
throughout with soft, glandular hairs; leaves 8-13 mm. long, 
one- to three-parted; flowers many, solitary or in groups of two to 
four; floral bract one half the length of calyx, deeply three-parted 
