P OL EM ON I A CEA E. 759 



calyx-teeth subulate, as long as the tube, or longer; corolla-tube somewhat exceed- 

 ing the calyx, the limb about 16 mm. broad, blue or lilac. N. Dak. to Neb. and 

 Mont. May-June. 



13. Phlox subulata L. GROUND OR Moss PINK. (I. F. f. 2979.) Pubes- 

 cent or becoming glabrate, forming mats, much branched, the branches 515 cm. 

 long. Leaves acute or acuminate, 8-20 mm. long, 1-3 mm. wide, spreading, cili- 

 ate, commonly fascicled at the nodes; flowers slender-pedicelled; calyx 8-9 mm. 

 long, its teeth subulate from a broader base, about as Ion gas the tube; corolla pink, 

 purple or white, its lobes shorter than the tube. In dry sandy or rocky soil, N. Y. to 

 Fla., Mich, and Ky. Escaped from cultivation in N. Eng. April June. 



14. Phlox Brittonii Small. BRITTON'S PHLOX. Similar to the preceding. 

 Leaves shorter and narrower; upper part of the plant glanduiar- pilose; calyx 5-7 

 mm. long; corolla white, the tube longer than the calyx, the lobes cuneate-obovate 

 with 2 pale magenta spots near the base. Mountain slopes, Va. and W. Va. to 

 N. Car. April May. 



15. Phlox bryoides Nutt. Moss PHLOX. (I. F. f. 2980.) Depressed, moss- 

 like, densely branched from a deep woody root, forming compact tufts 5-8 cm. 

 high. Leaves about 2 mm. long, closely imbricated in four ranks, copiously white- 

 woolly, triangular- lanceolate, pale, acute, the margins infolded; flowers solitary 

 and sessile at the ends of the branches, about 5 mm. long; tube of the corolla longer 

 than the calyx, its lobes broadly cuneate, entire. On dry hills, western Neb. and 

 Wyo. May-July. 



16. Phlox Hoodii Richards. HOOD'S PHLOX. (I. F. f . 2981.) Densely 

 tufted and branched from a woody root, 5-10 cm. high. Leaves imbricated, erect, 

 rigid, subulate, mucronate, somewhat woolly or ciliate, becoming glabrate, 4-12 

 mm. long; flowers sessile at the ends of the branches, about I cm. long; calyx-teeth 

 lanceolate, acuminate, rigid, longer than the tube; corolla-lobes obovate, entire. 

 In dry sandy or rocky soil, Manitoba to the N. W. Terr., western Neb. and Wyo. 

 May-July. 



17. Phlox Douglasii Hook. DOUGLAS' PHLOX. (I. F. f. 2982.) Similar 

 to the preceding species; leaves less imbricated, sometimes spreading, rigid, usually 

 fascicled at the nodes, 8-14 mm. long. Flowers sessile or short-pedicelled at the 

 ends of the branches 1-1.6 cm. long;' calyx-teeth narrowly lanceolate, acuminate, 

 about equalling the tube; tube of the purple or white corolla longer than the calyx, 

 its lobes obovate, entire. Dry soil, Neb. and Mont, to Utah, Cal. and Br. Col. 

 May-July. 



Phlox Douglusii andfcola (Nutt.) Britton. Leaves longer, 16-25 mm. long, less fas- 

 cicled at the nodes. Range of the type. Perhaps specifically distinct. 



2. CILIA R. & P. 



Calyx 5-toothed or 5-cleft, the sinuses usually scarious. Corolla funnelform, 

 tubular, campanulate or rarely salverform, 5-lobed. Stamens equally or unequally 

 inserted on the corolla. Ovary 3-celled. Capsule ovoid or oblong, 3- celled, at 

 length distending and rupturing the calyx. Seed-coat commonly mucilaginous 

 when wetted, in some species emitting spiral thread-like tubes. [Named for Philip 

 Gil, a Spanish botanist.] About 75 species, natives of America. Besides the fol- 

 lowing, some 48 others occur in southern and western N. Am. 



Leaves entire. 



Flowers paniculate. I. G. gracilis. 



Flowers narrowly thyrsoid-spicate. 6. G. spicata. 



Leaves pinnately divided, pinnatifid or palmatifid. 



Leaves palmatifid into 5-7 rigid subulate segments. 2. G. caespitosa. 



Leaves pinnatifid or pinnately divided, the segments linear, not rigid. 

 Flowers thyrsoid-paniculate or corymbose-paniculate. 

 Corolla 2-5 cm. long; plants 3-12 dm. tall. 



Flowers paniculate, white. 3. G. longiflora. 



Flowers narrowly thyrsoid, red. 4. G. aggregata. 



Corolla 6-10 mm. long, violet or blue. 5. G. pinnatifida* 



Flowers narrowly thyrsoid-spicate, purplish. 6. G. spicata. 



Flowers in dense or capitate cymes, or heads. 

 Flower-clusters leafy-bracted. 



