146 POLEMONIACEAE 



Stamens inserted on or near base of corolla-tliroat ; capsule 1 or 2-seeded; corolla blue or 

 purple. 

 Bracts and calyces glandular-pubescent, some of the leaves and bracts with the terminal 

 segment oblanceolate to spatulate-dilated, the margin cut into upwardly pointed 

 laciuiae; capsules about l^A lines long, 4-valved; cotyledons deeply cleft into 

 3 lobes, seeming as if 6 cotyledons. 

 Capsule 1 or 2-seeded, rounded at the apex; corolla-throat % to as long as corolla- 

 tube; cent, and n. Cal 10. N. pubescens. 



Capsule 1-seeded, 4-angled at apex; corolla-throat % as long as corolla-tube; South 



Coast Eanges and Lake Co 11. N . mitracarpa. 



Bracts and calyces hairy, not glandular ; capsules about 1 line long, 8-nerved at base and 



8-Talvate at base; cotyledons entire ; Lake and Colusa Cos 12. N. jepsonii. 



Capsule not dehiscent from the base; stamens inserted on base of corolla- throat; corolla blue or 

 purple. 

 Capsule ciroumscissile, the top lifting like a lid from the single oblong seed; leaves and outer 

 bracts bipinuatifid with a conspicuous ovate-lanceolate terminal segment; Sierra 



Nevada in Kern Co 13. N. seiiloba. 



Capsule 4-valved, dehiscent from the apex, 4 to 8-seeded ; leaves filiform, the lower ones pin- 

 nate with filiform segments; stamens long-exserted; Sierra Nevada foothills 



14. N. filicaulis. 



S. Capsule S-celled, 3-valved; styles 3-cleft ; stamens included or only shortly exserted. 



Anthers oval or elliptic, small (less than % line long). 



Leaves filiform, entire or with 1 to several pairs of filiform lobes mostly near the base. 

 Bracts palmately 3 to 5-c!eft, these and calyces white-tomontose, not glandular. 



Corolla yellow or purple, about 1^ times as long as calyx; stamens shortly exserted; 



Sierra Nevada foothills 15. N. proUfera. 



Corolla purple or pinkish, nearly as long as the calyx ; stamens included ; Sierra 



Nevada and North Coast Ranges 16. N. divaricata. 



Bracts pinnately divided, the lobes mostly bi- or tri-partite into acicular subulate divi- 

 sions, these and calyces glandular-puberulent ; corolla yellow; stamens shortly 



exserted; Sierra Nevada (e. side or easterly summits) 17. N. hreweri. 



Leaves (at least the upper) commonly with rachis relatively broad (% to 4 lines wide). 



Leaves pinnately parted, some of them with the divisions incised or parted; stamens 

 included. 

 Corolla 5 to 6 lines long ; stamens unequally inserted about middle of corolla-tube, 

 the longer filaments % to 1 line long; Coast Eanges and n. Sierra Nevada 



foothills 18. N. squarrosa. 



CoroUa 2i/4 to 3 lines long; stamens inserted below middle of corolla-tube, the fila- 

 ments less than % line long; Coast Eanges 19.N.mellita. 



Leaves merely pinnatifid or incised. 



Bracts mostly ovate, coriaceous, laciniate-toothed towards the base, abruptly acerose- 

 pointed at the tip; corolla 5 lines long; mostly erect slender plants; cent. 



Coast Eanges 20. N. heterodoxa. 



Bracts and leaves ovate to oblong-lanceolate or linear, coriaceous, very spiuy-pin- 



natifid; corolla 7 to 9 lines long; mostly spreading very coarse plants; 



Coast Eanges, San Joaquin Valley and coastal S. Cal... 21. N. atractyloides. 



Anthers oblong to linear-oblong; rachis of the leaves filiform or the upper leaves with broadened 



rachis; leaves and bracts pinnatifid; stamens shortly exserted; cent, and n. Cal 



22. N. viscidula. 



1. N. leucocephala Benth. (Fig. 374.) Stem simple or branching from the 

 base, 3 to 5 inches high, the heads terminal on the stem or main branches, usually 

 with secondary branches proliferous from beneath them; herbage puberulent or 

 the leaves glabrate ; leaves % to 2 inches long, pinnately parted, the divisions fili- 

 form, mostly remote, entire or sparingly lobed, the rachis broad and often pro- 

 longed into an elongated terminal entire division ; heads dense, 1/4 to 1 inch broad, 

 the outer foliaceous bracts conspicuously exceeding the heads; bracts glabrous 

 but the margins ciliate ; body of bracts narrow-ovate or oblong, spinosely margined, 

 the spines sometimes forked, sometimes arising from the back of the body of the 

 bract ; calyx glabrous or sometimes scantily puberulent, always with a ring of hairs 

 at the base of the calyx-lobes inside, the teeth mostly entire and nearly equal, 

 shorter than corolla ; corolla clear white, 2 to 4 lines long ; stamens inserted at about 

 middle of corolla-throa:t ; style not cleft or only slightly ; capsule 2 or 4 to 8-seeded. 



Clay depressions, often in alkaline soil, on valley floors or plains and beds of 



