150 POLEMONIACEAE 



some of them) pmnatifid with cuspidate or subulate sefrments; corolla pale blue, 

 3^2 to 5 lines long, about l^/i times as long as the ealj-x, the throat funnelform ; sta- 

 mens inserted on base of corolla-throat; style 3-cleft; capsule 2 to several-seeded, 

 not regularly dehiscent; seeds pitted. 



Low open hills and valley floors, 30 to 1000 (or 4300) feet: Cuyamaca Mts., 

 Southern California ; North Coast Ranges from Sonoma and Napa Cos. to western 

 Siskiyou Co. ; Sacramento Valley ; Sierra Nevada foothills from Tuolumne Co. to 

 Butte Co. North to Washington. Apr. -June. 



Biol. note. — By mid-May or June the foliage leaves, both basal and cauline, of the stems of 

 Navarretia tagetina have largely disappeared, and the slender divisions of the bracts and calyces 

 of the flower heads have become indurated or spiny. The innermost bracts are not only spiny- 

 bipinnatifid above, but are armed with forked spines inside the margin of the much -broadened 

 lower portion of the raehis which is somewhat coriaceous and is glabrous inside. Since these spiny 

 inner bracts invest closely the spiny-tipped calyces, they become physiologically a part of the fruit 

 and thus make of the capsule a sort of bur. Because these calyces and bracts invest the capsule 

 so closely, they sometimes simulate an outer capsule! The capsule itself is extremely thin-walled. 

 Towards maturity the thin capsular walls collapse closely about the seeds and become somewhat 

 indurated. The capsule is, therefore, not regularly dehiscent. 



The stamens are shortly exserted, with the filaments inserted on or near base of the corolla- 

 throat. The style is rarely 2 or 4-cleft. 



Locs. — Cuyamaca Mts., 8. Cal.: Cuyamaca Lake, K. Brandegee. North Coast Ranges: Davis 

 Hills, Vaea Mts., Jepson 15,023; betw. Santa Eosa and Sebastopol, K. Brandegee ; Howell Mt., 

 Napa Range, Jepson 15,027 ; Pope Valley, Napa Co., Jepson 15,689; Calistoga (hills sw.), Jepson 

 15,022 ; Cobb Mt., sw. Lake Co., M. S. Baler 225Sa ; HuUville, Gravelly Valley, n. Lake Co., Jepson 

 15,026; Ukiah Valley, Jepson 9278; Dobbyn Creek forks, Humboldt Co., Tracy 4709; Mail Ridge, 

 8. Humboldt Co., Jepsnn 16,386; Grasshopper Ridge, head of Canoe Creek, Humboldt Co., Tracy 

 4758; Yreka, Butler 740. Sacramento Valley: Birds Ldg., s. Solano Co., Jepson 15,024; Vaca- 

 ville, Jepson 4246; Sweeney Creek, nw. Solano Co., Jepson 9052; Pleasant Grove, Sutter Co., 

 Hoover 2217; Pine Creek road sta., Tehama Co., Jepson 12,351; Sourgrass Creek, 7 mi. s. of Cor- 

 ning, Jepson 18,969. Sierra Nevada foothills: Chinese Camp, Tuolumne Co., Hoover 2370; Salt 

 Springs Valley, Calaveras Co., Tracy 5661 ; lone, Amador Co., Braunton 1030 ; Pilot Hill, Eldorado 

 Co., K. Brandegee ; Oroville (8 mi. n.), Heller 11,383 ; Hutton Creek, near Hornbrook, e. Siskiyou 

 Co., Jepson 19,966. 



Refs. — Navarretia tagetina Greene, Pitt. 1:137 (1887), type loc. Siskiyou Co., Greene. 

 N. pubescens var. tagetina Jepson, Man. 789 (1925). 



6. N. subuligera Greene. Stem erect and subsimple or branching, somewhat 

 flexuous, 2 to 6 inches high, microseopicall.y puberulent; leaves glabrous or sub- 

 glabrous, Yo to 11/4 inches long, pinnately divided into linear-filiform or subulate 

 lobes with 1 to 3 pairs of lobes below the middle, the terminal lobe elongated; low- 

 est leaves linear-filiform, entire; flower heads borne racemosely on short peduncle- 

 like branches along the main stem, the peduncles 14 to 1 inch long ; bracts ovate, 

 coriaceous, spiny-pinnatifid, the central spine prominent and much surpassing the 

 head proper, the back of the bracts bearing spines just inside the margin ; calyx- 

 lobes 4 or 5, all entire, 2 or 3 rather short; mouth of calyx-tube inside with a ring 

 of hairs; corolla white, 3 lines long, shorter than the calyx ; stamens included; style 

 3-cleft ; capsule translucent, closely invested b.v the bracts so as to form a sort of 

 bur ; seeds several, agglutinated in a mass. 



Rocky plains or mountain slopes, 400 to 2500 feet: foothill or rocky borders of 

 the Sacramento Valley, but little-known and very rare (Amador Co. ; Mt. St. 

 Helena; Tehama Co.). North to southern Oregon. May-June. 



Field note. — A rocky plain of rubble stones, anciently derived from one of the great eruptions 

 of Lassen Peak, lies 3 to 6 miles northeast of Red Bluff, in the upper Sacramento Valley. On it 

 two collections have been made of the plant here called Navarretia subuligera. namely Jepson 

 16,355 and 16,347. These specimens are conspecific with specimens found on Mt. St. Helena (East- 

 wood 4670), teste Virginia Bailey, as also with specimens from near Trail, Jackson Co., Ore., 

 J. T. Howell 6778. No material has been seen from the type locality of this species. 



Ref. — N.^VARRETiA SUBULIGERA Greene, Pitt. 1:137 (1887), type loc. "Amador Co." (that is. 

 Sierra Nevada and undoubtedly in the foothills), Curran. 



7. N. nigellaeformis Greene. Adobe Gilia. Stems 3 to 5 inches high, simple, 

 or branched from the base, minutely puberulent; leaves subglabrous, 3^ to 1% 



