PHLOX FAMILY 189 



VI. PINNATIFIDAE. 



Duisions of the leaves all linear-flliform, not wider than the racliis: corolla about 1 cm. 



long. 27. G. polyantha. 



Division.?, at least of the lower leaves, obovate or oblong, much broader than the rachis. 



Corolla-tube 4-6 mm. long: caly.x-lobes acuminate. 28. G. calcarea. 



Corolla-tube 8-10 mm. long; calyx-lobes acute. 29. G. MacVickerae. 



VII. INCONSPICUAE. 



Corolla 7-14 mm. long. 



Calyx about one-fourth as long as the corolla. 30. G. scopulorum. 



Calyx one-tliird to two-thirds as long as the corolla. 



Corolla-tube distinctly exserted from the calyx; leaves mostlj- basal or the stem- 

 leaves reduced. 

 Plants branched near the base; the few stem-leaves pinnatifid. 

 Limb of the corolla 5-6 mm. wide; calyx glandular-puberulent. 



31. G. hutchinsi folia. 

 Limb of the corolla 3—4 mm. wide; calyx glabrous or nearly so. 



32. G. sinuata. 

 Plants simple below, branched above; stem-leaves several, lanceolate, sharply 



toothed or rarely entire. 33. G. straminea. 



Corolla-tube scarcely exserted from the calyx; plant more leafy. 



34. G. inconspicua. 

 Corolla 4-6 mm. long. 



Plant leafy only at the base; divisions short and broad: corolla about twice as long 



as the calyx. 35. G. subacaulis. 



Plants leafy throughout ; divisions of the leaves narrow ; corolla only slightly exceeding 

 the calyx. 

 Leaves pinnatifid, with linear or oblong divisions. 36. G. Tweedyi. 



Lower leaves sometimes pinnatifid, with filiform divisions, otherwise the leaves 

 filiform and entire. 47. G. minutiflora. 



VIII. Leptomeriae. 



Stamens exserted; inflorescence narrow and spike-like; leaves pinnately lobed. 



37. G. stenothyrsa. 

 Stamens not exserted: inflorescence an open panicle. 



Basal leaves toothed or lobed: annuals, biennials, or short-lived perennials. 

 Flowers 1 cm. long or more. 



Plant densely glandular; stem-leaves oblanceolate, usually toothed; corolla 



scarlet or orange. 38. G. subnuda. 



Plant nearly glabrous; upper stem-leaves lanceolate-subulate, entire; corolla, 

 rose-colored. 

 Calyx 5 mm. long; corolla 15 mm. long. 39. G. Crandallii. 



Calyx 3 mm. long: corolla 10 mm. long. 40. G. Haydeni. 



Flowers less than 1 cm. long: annuals. 



Leaf-blades lanceolate, sinuately lobed; lobes scarcely spinulose-tipped. 



41. G. leplomeria. 

 Leaf-blades orbicular or obovate, spinescent-toothed. 42. G. latifolia. 

 Basal leaves oblanceolate, entire; perennials. 



Basal leaves 4-5 cm. long. 43. G. pentstemonoides. 



Basal leaves 1 cm. long. 



Corolla about 5 mm. long: plant simple. 44. G. sedi folia. 



Corolla about 10 mm. long; plant cespitose. 45. G. caespitosa. 



IX. MINXJTIFLOR.AE. 



TaU plants with strict branches and erect pedicels. 



Pedicels longer than the fruiting calyces; branches ascending: capsule ■with 2 seeds 



in each cell; corolla 5 mm . long. 46. G. sinistra. 



Pedicels usually shorter than the fruiting calyces; branches nearly erect; capsule- 

 1-seeded: corolla 3-4 mm. long. 47. G. minutiflora. 



Low deUcate plants with spreading branches; pedicels in fruit reflexed. 



48. G. tenerrima. 



9. LANGLOiSIA Greene. 



Corolla almost regular and stamens nearly straight. 1. L. setosissima. 



Corolla bilabiate and the stamens declined, curved. 2. L. Schottii. 



10. LINANTHUS Benth. 



Corolla short salver-shaped or campanulate. 



Calyx 7-8 mm. long; corolla 10-15 mm. long; stamens inserted in the middle of the 



tube. 1. L. Bigelovii. 



Calyx 4 mm. long; corolla 6-7 mm. long; stamens inserted near the base of the tube. 



2. L. Dactylophyllum. 

 Corolla with a funnelform throat and short tube. 



Corolla more than t^vice as long as the hirsute or strigose calyx. 



3. L. pharnaccoides. 

 Corolla about half longer than the glabrous calyx. 4 L. Harknessii. 



11. GYMNOSTERIS Greene. 



Lobes of the corolla 3-4 mm. long, truncate, undulate at the apex. 1. G. nudicaulis. 



Lobes of the corolla 1-1.5 mm. long, acutish. 2. G. parvula. 



