PHLOX FAMILY 441 



Plant coarsely pubescent in inflorescence, not white-villous throughout; corolla yellow with a 

 dark purple .pot at base of each petal; capsule 4-8-seeded; ^^amen^ equaL^^^^^^^.^^ 



Plant soft white-villous or canescent throughout; corolla purple, blue, white, or yellow, with 

 or without spots or streaks of purple; capsule 1-seeded; stamens unequal to subequal. 

 Corolla 8-12 mm. long, cream-yellow and often spotted or marked with purple; stamens 



1-3 mm. long, equally inserted on the throat. U. A^. criocephala. 



Corolla 6-7 mm. long, white or blue; stamens 0.5-1 mm. long, "j"^'l'-]^"]|^,j^^^J",'j^'|j °" ^^^ 



Stamens inserted on lower half of throat; capsule 1- rarely 2-seeded. 



Capsule panerv, faintly 8-nerved, dehiscing into about 8 valves; leaf-rachis linear throughout, 



terminal lobe acerosetoothed. \S. N . Jepsomv. 



Capsule coriaceous, plainly 4-nerved, dehiscing into 4 valves; leaf expanding above middle into 

 broad blade, often with deep lobes. 

 Capsule circumscissile about the middle, the upper part dehiscing into 4 valves; rachis of 

 bract often ovate, coriaceous below, and expanding above a constriction into an 

 elliptic, blade-like tip. 16. N. setiloba. 



Capsule circumscissile about the base. 



Leaf-rachis above middle broad and marginally toothed, lower lobes short, 2-forked; 



capsule 4-angled due to thickening along nerves. 17. N. initracarpa. 



Leaf with linear rachis, deeply lobed above middle; at least 1 pair of long and bi- 

 pinnate lobes below; capsule not prominently 4-angled. 

 ^ 18. A'^. pubescens. 



Capsule 2-3-celled; stigma 2-3-lobed or entire. 



Leaves slender with filiform rachis, entire or pinnate, with 1-7 pairs of narrowly linear lobes near base 

 much-exceeded by elongate terminal segment, becoming bracteate and palmate just beneath the 

 inflorescence; branches slender to filiform, mostly naked; plant not markedly glandular, at most 

 only glandular-puberulent. 

 Capsule 3-celled with 3 valves, dehiscing from the base upward; bracts subglabrous, glandular- 

 puberulent or villous. 

 Branches typically proliferating from beneath terminal heads; bracts palmate. 



Corolla 10 mm. long, exceeding calyx; longest stamens just exserted; bracts densely coarse- 



viUous dorsally. l"*- -V. /"o/i/cra. 



Corolla 3 5-7.5 mm. long, shorter than calyx; stamens included; bracts subglabrous dor- 

 sally, but ciliate in sinuses of lobes. ^1)- N- dwaricata. 

 Branches not typically proliferating from beneath terminal heads; bracts pinnate. 



Herbage sparsely arachnoid; lobes of leaves and bracts about 0.5 mm. broad; stamens 



subequally inserted in throat, included. 21. N. penmsularis. 



Herbage glandular-puberulent; lobes of leaves and bracts pungent-filiform; stamens equally 

 inserted in throat, barely exserted. 23. N. Brewerx. 



Capsule 2-celled, valves separating from top downward into 2-4 segments; bracts glandular-puberu- 

 1 ^^j 23. N . pncaults. 



Leaves, at least the upper, not filiform, pinnately lobed or unequally cleft, terminal segnient not elongate; 

 JDranches stout and leafy ; herbage markedly glandular to viscid, bracts often bearing yellowish 

 globules of exudate. 

 Base of bracts broad, ovate. 



Terminal segment of bract elongate and dissected at apex into 3 diverging, sharply acerose 

 teeth. 

 Stamens unequally inserted, included; corolla-throat narrow. 24. N. atracty hides. 



Stamens equally inserted, unequal in length, exserted; corolla-throat ample. 



25. A'^. hamata. 



Terminal segment of bract not elongate, the bract digitately lacerate into simple lobes. 



26. A", heterodoxa. 



Base of bracts narrower, linear to lanceolate. 



Middle cauline leaves with rachis 1-5 mm. broad, bordered by few to numerous, opposite, equal, 

 regularly spaced, short teeth or short-filiform lobes, only rarely bipinnate; corolla V.i- 

 17 mm long; stamens 2.5-8 mm. long, unequal to subequal, the longest exserted. 



27. A^. visctdula. 



Middle cauline leaves with rachis 1-2 mm. broad, dissected with numerous irregular, unequal 

 subulate lobes, usually proliferating from base, often crowded and bipinnate; corolla 6-1/ 

 mm. long; stamens subsessile to 4 mm. long, unequal to equal, included. 



Corolla 9-12 mm.; capsule 3-4 mm.; plant with mephitic odor; stamens 1-4 mm. long. 



28. A*, squarrosa. 



Corolla 6-7 mm.; capsule 2.5 mm.; plant with honeyscented odor; stamens 0.75-1.5 mm. 

 long_ 29. A^. melhta. 



L Navarretia leucocephala Benth. White-flowered Navarretia. Fig. 3974. 



Navarretia leucocephala Benth. PI. Hartw. 324. 1843. 



Erect to prostrate annual, 3-17 cm. high, stems white or reddish-streaked, simple or race- 

 mosely branched, rarely proliferating from below the heads, glabrous to sparsely pubescent below, 

 becoming densely pubescent above, with white, retrorse, crisped hairs. Lower leaves linear, pin- 

 nately lobed or entire, 1-8.5 cm. long, glabrous, lobes blunt to cuspidate, 3-10 mm. long, upper 

 leaves pinnate to bipinnate, 0.5-5 cm. long, lobes cuspidate to acerose, glabrous to sparsely 

 pubescent below; flowers sessile or subsessile in heads; bracts 0.4-1.5 cm. long, pinnate to 

 bipinnate, proliferating on dorsal side between lobes, often ciliate, membranous-winged on mar- 

 gins and between lobes, outer bracts foliaceous ; calyx 5-7 mm. long, cleft to base, sepals acerose, 

 entire, pubescent about midway on dorsal side, rarely some of them with 2 teeth above, sinuses 

 about'three-quarters filled with membrane which is truncate and ciliate across top; corolla fun- 

 nelform, 7-9.5 mm. long, white, tube 3.5-5.5 mm., throat 1.5-2 mm., lobes 1.5-2 mm.; stamens 

 inserted equally about middle of throat, 2-5 mm. long, exserted ; style exserted, stigma less than 

 0.25 mm. long, 2-lobed ; capsule ovoid, 2.5 mm. long, indehiscent, locules 4-6-seeded. 



Vernal pools; Lane County, Oregon, south in the Inner Coast Ranges to San Benito County, California, 

 inland in the Sacramento and San Joaquin Valleys and in the Sierra Nevada foothills from Butte County south 

 to El Dorado County; also Honey Lake Valley, Lassen County, California. Type locality: Sacramento Valley. 

 April-June. 



