154 POLEMONIACEAE 



Eefs. — Navakretia mitracaepa Greene, Pitt. 1:135 (1887), type loc. "somewhere in Lake 

 Co.,"(7»rra«; Jepson, Man. 790 (1925). N. jarediiEastw.,Zoe5:S9 (1900), type loc. Paso Eobles 

 Creek, San Luis Obispo Co., L. Jared; Jepson, Man. 789 (1925). 



12. N. jepsonii V. Bailey sp. n. Stem branching at or above the base, prostrate 

 or diffuse, the branches slender, 4 to 6 inches long, often proliferous from beneath 

 the initial subsessile heads ; herbage minutely puberulent ; leaves 4 to 7 lines long, 

 bipinnately divided into filiform or subulate segments I/2 to 2 lines long; bracts 

 bipinnatifid into subulate segments; calyx-teeth lanceolate, cilia te, equaling or ex- 

 ceeding the calyx-tube, all entire or the 3 longer toothed ; calyx-tube glabrous or 

 subglabrous, with narrow membranous intervals beneath the sinuses running half- 

 way to base; corolla purple with a darker purple spot at the base of each lobe, 3 to 4 

 lines long, equaled by the longer calj^-teeth ; stamens mserted a little above base 

 of corolla-throat, the filaments exserted; style 2-cleft; capsule 1-celled, 1-seeded, 

 more or less membranous (especially below), the rounded summit with a papilla- 

 like apiculation, acutish at base, 8-valvate from base; cotyledons 2, entire. — (Planta 

 ramosa, prostrata vel diffusa, ramis gracilentis 4-6 unc. longis, saepe proliferis 

 ab basi capitulorum primorum subsessilium ; pubes minuta; folia 4-7 lin. longa, 

 bipinnatifida, segmentis filiformibus aut subulatis ; calycis dentes lanceolati, ciliati, 

 integri vel 3 longiores denticulati, tubo aequantes vel superantes; corolla 3-4 lin. 

 longa, purpurea, lobis maculatis ad basin ; stamina exserta; stylus bifidus; capsula 

 uniloculata, unisperma, plus minusve membranaeea, oetovalvata, apiculata ad api- 

 cem ; cotyledones 2, integrae.) 



Deeply checked clays of valley floors or flats in the dry hills, 1500 to 2500 feet : 

 North Coast Ranges from southwestern Colusa Co. to central Napa Co. June-July. 



Field note. — Navarretia jepsonii is a rather narrow endemic of the Clear Lake region. It 

 comes into flower in the dry season and is an inhabitant of low spots on valley floors or flats in 

 the hills. The following stations validate its range: Epperson sta., Bear Valley, sw. Colusa Co., 

 K. Brandegee ; Indian Valley, ne. Lake Co., K. Brandegee ; Mt. Kouocti (Uncle Sam Mt.), (Ery- 

 thea 1:16) ; Knoxville Ridge, se. Lake Co., Jepson 20,956; Coyote Valley, s. Lake Co., Jepson 

 20,966; Aetna Sprs., Pope Valley, K. Brandegee. 



The differentials between Navarretia mitracarpa, chiefly of the South Coast Ranges as at 

 present known, and Navarretia jepsonii of the Clear Lake region have been worked out by Vir- 

 ginia L. Bailey as follows: "In Navarretia mitracarpa the corolla-throat is as long or nearly as 

 long as the corolla-lobes, the corolla-tube is glandular-puberulent outside; the style is definitely 

 2-cleft to barely 2-cleft; the capsule, about 1% lines long, is 4-ridged or d-angled at the summit 

 and 1-seeded, and it is also 4-valved from the base. 



"In Navarretia jepsonii the corolla-throat is shorter than the coroUa-lobes, the corolla-tube 

 is glabrous outside; the style is barely 2-cleft to entire; the capsule, 1 to 114 lines long and 

 1-seeded, is not 4-angled or 4-ridged at summit but is 4-nerved at summit with the nerves branch- 

 ing and thus 8-nerved at base. At base, too, the capsule is S-valved." — Virginia L. Bailey. 



Segregation of the species, Navarretia jepsonii, is the result of careful and conscientious work 

 by Virginia L. Bailey as a research assistant on the Flora of California. She was the first to dis- 

 tinguish this Lake County plant from the true Navarretia mitracarpa. (See sub no. 11.) 



Eefs. — Navarretia jepsonii V. Bailey; type loc. Coyote Valley, s. Lake Co., Jepson 20,966 

 (typ. in Herbario Jepsoniano). N. mitracarpa Jepson, Erythea 1:16 (1893) ; not Greene (1887). 



13. N. setiloba Cov. Stem erect, branching from near the base or subsimple, 

 4 to 9 inches high; herbage minutely puberulent; leaves Y^ to 1% inches long, 

 bipinnatifid with short acicular segments, the terminal lobe conspicuous, ovate- 

 lanceolate, 4 to 9 lines long, its margin irregularly and finely laciniate ; bracts with 

 lanceolate terminal lobe and subregnlar acerose-toothed margin, the raehis bearing 

 on and above the dilated base 2-forked acerose segments; calyx rather shorter than 

 the corolla-tube, its lobes lanceolate with broad base, entire or with very small 

 teeth, Y2 ^s long as the calj-x-tube ; corolla blue, 4 to 5 lines long; stamens inserted 

 at base of corolla-throat; style 2-cleft; capsule translucent at base and closely 

 adherent to the single whitish seed, the coriaceous top of the capsule dehiscent 

 like a lid. 



HUlslopes and plateau flats in red gravelly clays, 5000 to 7000 feet : southern 

 Sierra Nevada in Kern Co. June. 



