442 POLEMONIACEAE 



2. Navarretia minima Nutt. Least Navarretia. Fig. 3975. 



Navarretia minima Nutt. Journ. Acad. Phila. II. 1: 160. 1848. 



Cilia minima A. Gray, Proc. Amer. Acad. 8: 269. 1870. 



Navarretia Suksdorfii Howell, Fl. N.W. Amer. 457. 1901. 



Navarretia minima var. Suksdorfii Brand, Pflanzenreich 4--''': 164. 1907. 



Prostrate to suberect annual, 2.5-10 cm. high, with a spread of 1-11 cm., stems white or 

 sometimes reddish-tinged, simple, cespitose or divaricately branched, pubescent with white, 

 crisped, retrorse hairs. Lower leaves linear, entire, or pinnately dissected, cuspidate, 1-1.5 cm. 

 long, glabrous, upper 1-2.5 cm. long, linear, entire or pinnate with 1-3 pairs of "lobes, acerose ; 

 inflorescence capitate; bracts 0.7-1.7 cm. long, pinnate with 1 to several pairs of acerose lobes, 

 base of rachis membranous-winged, pubescent inside at base ; calyx 4-5 mm. long, cleft to base, 

 sepals usually entire, unequal, acerose, sparsely pubescent on dorsal side below, sinuses one-half 

 or more filled by membrane; corolla funnelform, 4-6 mm. long, white, tube 2-2.5 mm. long, 

 throat 1-1.5 mm., lobes 1-2 mm.; stamens equally inserted in middle of throat, 2.5-3 mm. long, 

 exserted ; style exserted, stigma less than 0.25 mm. long, 2-lobed; capsule ovoid, 2 mm. long, 

 indehiscent. 



Eastern Washington, south to the northern Sierra Nevada, California. Type locality: "Plains of the Oregon, 

 near Walla- Walla." July-Aug. 



3, Navarretia pauciflora H. L. Mason. Few-flowered Navarretia. Fig. 3976. 



Navarretia pauciflora H. L. Mason, Madrono 8: 200. 1946. 



Prostrate annual, 1^ cm. high and spreading 2-8 cm. ; hypocotyl with a thick spongy cortex ; 

 stems slender, filiform, 0.2-0.5 mm. thick, white with streaks of purple, densely clothed with 

 short white retrorse crisped hairs or almost glabrous. Leaves 1-2.5 cm. long, linear and entire 

 or pinnately parted into 1 or 2 pairs of linear cuspidate lobes each about 2 mm. long, glabrous ; 

 outer bracts foliaceous, few, 1.5-3 times the head, with several pairs of lobes below the middle, 

 membranous-winged below, those within the head little exceeding tlie calj^x. on inbranes ciliate- 

 margined, lobes acerose to cuspidate ; flowers sessile or subsessile in 2-10-flowered heads, heads 

 4-10 mm. broad ; calyx cylindric, 4-5 mm. long, membranous except for the lobes and the narrow 

 band of tissue below them, this often reduced to a single vascular strand, membrane in the sinus 

 truncate across the top and ciliate on the upper margin, lobes pubescent within ; corolla funnel- 

 form, 5-6 mm. long, blue or white, fading blue, tube 3 mm., throat 1.5 mm., lobes 1.5 mm. long; 

 stamens inserted in the sinuses of corolla-lobes, equal in length, somewhat exceeding the petals 

 and well-exserted from throat ; stigma e.xserted, 2-lobed, lobes minute ; capsule irregularly de- 

 hiscent, the somewhat thickened top falling away irregularly from the membranous sidewalls, 

 seeds 1 to several, minutely pitted, reddish brown. 



Known only from the type locality, vernal pool in volcanic rubble, S miles north of Lower Lake, Lake County, 

 California. June. , 



4. Navarretia plieantha H. L. Mason. Many-flowered Navarretia. Fig. 3977. 



Navarretia plieantha H. L. Mason, Madroiio 8: 199. 1946. 



Prostrate annual forming a mat 5-20 cm. broad with several stout branches but not prolifer- 

 ating from below a central head, the main axis often with crisped retrorse hairs, lateral stems 

 glabrate, the epidermis often exfoliating as a white membrane-like tissue. Leaves 3-4 cm. long, 

 linear and entire or pinnate with a few remote filiform lobes ; outer bracts foliaceous, 3 or 4 to 

 each head, 1-2 times the head, pinnate, the lobes often proliferated 2^ times or the bract simple- 

 pinnate, rachis flanked by a ciliate membrane below, bracts within the inflorescence with from 

 1 to several pairs of lobes below the middle, entire above or with a pair of acerose teeth ; flowers 

 in heads 1.5-2 cm. broad, heads 20-50-flowered ; calyx somewhat constricted above, 4-5 mm. 

 long, membranous throughout except for the herbaceous lobes and a line of herbaceous tissue 

 immediately below the lobes, glabrous or with a few weak hairs except for the ciliate margin of 

 the truncated membrane in the sinus of calyx-lobes ; corolla 5-6 mm. long, blue, funnelform, tube 

 3-3.5 mm. long, included in calyx-tube, throat 0.5 mm., lobes 2 mm. long; stamens inserted in 

 the sinuses of the corolla-lobes, 2.5 mm. long; stigma exserted, 2-cleft to 2-lobed or entire; 

 capsule not regularly dehiscent, the somewhat thickened top breaking away irregularly from 

 the membranous walls when wetted, the seeds working out of the constricted orifice of the calyx 

 and resting on top ; seeds about 3 to each capsule, reddish brown and minutely pitted. 



Known only from the type locality, in peaty soil, Boggs Lake, northwest slope of Mount Hannah, Lake County, 

 California. June. 



5. Navarretia Bakeri H. L. Mason. Baker's Navarretia. Fig. 3978. 



Navarretia Bakeri H. L. Mason, Madroiio 8: 198. 1946. 



Erect spreading annual, 2-5 cm. high ; stems racemosely branched, 0.5-1 .5 mm. thick, densely 

 clothed with retrorse crisped hairs. Lower leaves linear, entire to few-toothed or pinnatifid, 

 upper dissected, lobes often proliferating, glabrate below, pilose with short, crisped hairs above; 

 outer bracts foliaceous, pinnatifid with highly dissected proliferations ; bracts within head pin- 

 nate with 1-2 pairs of teeth in upper third and 1 pair of lobes below middle with proliferating 

 lobes from their bases or from the dorsal surface of the rachis ; flowers in heads ; calyx-lobes 

 unequal, the longest lobes 5.5 mm., slender-aristate, with a few weak hairs, membranous to base 

 in sinuses, free margin of membrane ciliate ; corolla white, 5-7 mm. long, tube 4 mm., throat 

 0.5-1 mm., lobes 1-1.5 mm. long; stamens inserted in the sinuses of corolla-lobes, 2.5 mm. long, 

 exserted from throat ; style exserted, stigma minutely 2-lobed ; capsule about 2 mm. long, the 



