POLEMONIACEAE (PHLOX FAMILY) 403 



calyx; the broad lobes obovate, rounded at the apex, 4-6 mm. long: ovules 

 6-8 in each cell: capsule shorter than the calyx. Wyoming to California and 

 Washington. 



5. NAVARRETIA Ruiz and Pavon 



Glabrous or viscid-pubescent annuals. Leaves all alternate, pinnatifid, 

 setaceous or spinose. Flowers in crowded bracteate clusters terminating the 

 branches. Calyx-tube scarious between the five prominent green ribs pro- 

 longed into the unequal pungent lobes. Corolla tubular, funnelform, or salver- 

 form. Stamens and style either included or exserted. Capsule 1-3-celled, 

 1-many-seeded. Under Gilia. 



Glandular-viscid 1. N. Breweri. 



Glabrous. 



Stems erect, simple or branched; corolla about 5 mm. long . . . 2. N. intertexta. 



Stems low, mostly divaricately branched at the base; corolla small, 



less than 2 mm. long 3. N. minima. 



1. Navarretia Breweri (Gray) Greene, Pitt. 1: 137. 1887. Erect or at 

 length much branched and diffusely spreading, 3-12 cm. high, very minutely 

 gland ular-puberulent all over: flowers somewhat glomerate: leaves with 

 mostly simple acicular-subulate divisions: calyx-lobes similar to these, nar- 

 rowly subulate, about equaling the yellow corolla, 6-8 mm. long, 3 or 4 times 

 the length of the tube: ovules 1 or 2 in each cell. From Wyoming to Utah, 

 Nevada, and California. 



2. Navarretia intertexta (Benth.) Hook. Fl. Bor. Am. 2: 75. 1838. Erect 

 or widely branched, low and rather stout, neither viscid nor glandular; stem 

 retrorsely pubescent: leaves mainly glabrous, with divaricate, acerose- 

 spinescent divisions sparingly divided or simple: flowers densely glomerate: 

 tube of the calyx and base of the bracts strongly villous with white spreading 

 hairs; the lobes equaling the white corolla, 6-8 mm. long: ovules and seeds 3 or 

 4 in each cell. P'rom the Rocky Mountains westward to California and Oregon. 



3. Navarretia minima Nutt. Journ. Acad. Phila. 1: 160. 1848. Depressed, 

 often forming broad tufts, 2-6 cm. high, glabrate: leaves acicular and with 

 simpler and fewer divisions than the preceding: tube of the calyx white-hairy 

 in the broad sinuses, as long as the unequal lobes, which equal or exceed the 

 white corolla, 3 mm. long: ovules 1-3 in each cell. In very dry regions from 

 Dakota to Colorado and Oregon. 



6. POLEMONIUM L. 



Mostly perennial herbs, with alternate pinnate or plnnately parted leaves, 

 and blue or white or rarely purplish flowers, which are mostly terminal, either 

 solitary, 2-3 together, or aggregated in capitate or paniculate cymes. Calyx 

 rotate-campanulate to tubular. Corolla funnelform to nearly rotate. Stamens 

 equally inserted; the filaments more or less declined and usually pilose- 

 appendaged at base. Capsule oblong to globose. Seeds black or brown, ob- 

 long, often angled or even winged. 



Corolla campanulate; filaments pilose-appendaged at base; leaf- 

 lets not verticillate. 

 Stems tall, leafy, solitary. 



Inflorescence narrow, usually densely thyrsoid. 



Plants from a slender rootstock; seed-coats unchanged if 



wetted . . . . . . . . . 1. P. occidentale. 



Plants from a lignescent caudex; seed-coats becoming mu- 

 cilaginous if wetted . . . . . . . 2. P. foliosissimum. 



Inflorescence broad and open. 



Stems and herbage pubescent 2. P. foliosissimum. 



Stems and herbage glabrate 3. P. fihcinum. 



Stems low, several to many in tufts, sparsely leafy or only 



bracteate. 

 Seeds angled but not winged. 



Stems from a rootstock with a single or nearly simple crown 4. P. pulchemmum. 

 Stems from a lignescent freely branched caudex . . 5. P. Haydenii. 



Seeds narrowly winged 6. P. pterospermum. 



