POLEMONIACEAE (PHLOX FAMILY) 397 



the calyx, the lobes obovate, entire or somewhat erose, 7-8 mm. long: ovules 

 solitary in each cell. Cimarron, Montrose county, Colorado. 



15. Phlox puberula (E. Nels.) A. Nels. Low, 1 dm. high or less, stems erect 

 or ascending; more or less glandular-puberulent, very densely so on the ped- 

 icels and calyx, nearly destitute of roughish hairs: leaves usually spreading, 

 linear, bluntish at tip or apiculate, 2-4 cm. long, 1-2.5 mm. wide: replication 

 of the calyx sinuses very slight and inconspicuous: corolla light blue or lilac, 

 the lobes obovate or cuneate-obovate, retuse or blunt, 7-12 mm. long: ovules 

 solitary in each cell. (P. longifolia puberula E. Nels. 1. c. 26.) Frequent in 

 western Wyoming and adjacent Utah and Idaho. Flowering much earlier 

 than P. longifolia. 



16. Phlox Stansburyi (Torr.) Heller, Bull. Torr. Bot. Club 24: 478. 1897. 

 Stems several from a ligneous base, rather stout, usually simple below, cym- 

 osely branched above into leafy-bracted corymbs, about 1 dm. high; pubes- 

 cent throughout, roughly so above, the pedicels and calyx usually glandular: 

 leaves thick, usually recurved-spreading, linear or linear-lanceolate, apiculate, 

 20-35 mm. long, 2-3 mm. wide: flowers on pedicels 5-15 mm. long: calyx 1 cm. 

 long, the sinuses more or less replicate, the teeth apiculate or somewhat 

 cuspidate-attenuate, as long as the tube: corolla pink or rose-color, the tube 

 fully twice the length of the calyx, the lobes cuneate-obovate, erose, emar- 

 ginate or retuse, 7-8 mm. long: ovules usually one in each cell. (P. dasy- 

 phylla Brand, 1. c. 80. The type, Baker's No. 620, seems to be merely an 

 over-mature, hence glabrous, specimen of this species.) Colorado and New 

 Mexico and thence far westward. 



17. Phlox nana Nutt. PI. Gamb. 153. 1848. Herbaceous to the ground 

 or somewhat ligneous at base, 1-2 dm. high, stems freely branched; roughish- 

 pubescent throughout and more or less glandular: leaves spreading, opposite 

 below, alternate above, lance-linear, on the main stems 20-35 mm. long, 

 3-4 mm. wide, on the lateral branches shorter and narrower: flowers scat- 

 tered or somewhat corymbose, on pedicels 5-35 mm. long: calyx-teeth slightly 

 longer than the tube, green and apiculate: corolla "red" or "white," the 

 tube pubescent, somewhat exceeding the calyx, the lobes broadly cuneate- 

 obovate, entire or with wavy margins, often mucronate, about 15 mm. long: 

 ovules 2 or 3 in each cell. Common in New Mexico, also in Arizona. 



1. GYMNOSTERIS Greene 



Diminutive annuals devoid of proper foliage, the cotyledons persisting on the 

 otherwise naked stem. The capitate-congested inflorescence subtended by an 

 involucre of 4 or 5 leaves which are distinct and herbaceous above, but scari- 

 ous and united at base. Calyx vesicular and urceolate, thin-scarious, only the 

 unequal teeth herbaceous. Corolla salverform, with long and slender tube; 

 the somewhat dilated throat bearing the stamens, the whole marcescent- 

 persistent, the dilated base of the tube still investing the thin, apparently 

 indehiscent capsule with its ripe seeds. Seeds many, obliquely S9mewhat 

 cubical, the angles mcmbranaceously margined or winged; testa thin, muci- 

 laginous when wetted, but not developing spiracles. 



1. Gymnosteris nudicaulis (H. & A.) Greene, Pitt. 3: 304. 1898. Very 

 glabrous, 3-10 cm. high, at length branching from the base: stem leafless from 

 the cotyledons up to the inflorescence, which is a close head or glomerule 

 subtended by an involucre of several entire, ovate-lanceolate or lanceolate, 

 foliaceous bracts: corolla salverform, white, pink, or yellow; the tube 5-7 mm. 

 long and thrice the length of the calyx: ovules 10-16 in each cell. Sandy 

 stream banks. 



3. COLLOMIA Nutt. 



Herbs with alternate, mostly entire leaves. Calyx scarious below between 

 the angles, accrescent, obpyramidal or nearly cyathiform, not distended by 

 the capsule. Corolla tubular-funnelform, with open throat and a spreading 



