PHLOX FAMILY 423 



glabrous except on the pedicels and calyx. Leaves entire, filiform, 1-2 cm. long ; flowers vesper- 

 tine, sessile to short-pedicelled at the ends of the branches and in the axils of the cyme, pedicels 

 beset with capitate hairs ; calyx cleft to base into linear lobes, sparsely beset with gland-tipped 

 hairs, sinuses about three-fourths filled with a broad hyaline membrane which is truncate 

 across top and forms a conspicuous pseudotube ; corolla tubular-funnelform, about 1_ cm. long, 

 yellow, tube not clearly diflferentiated from throat, lobes obovate ; stamens inserted in corolla- 

 tube, about 2 mm. long, included, filaments glabrous ; pistil included, stigma about 1 mm. long ; 

 capsule ellipsoid, seeds reniform or sub-reniform, deeply constricted at hilum. 



Desert flats and slopes. Lower Sonoran Zone; eastern Mojave and Colorado Deserts from Inyo County, 

 California, to Lower California, east to Arizona. Type locality: "S.E. California." March-May. 



15. Linanthus arenicola (M. E. Jones) Jepson & Bailey. Sand Linanthus. 



Fig. 3940. 



Cilia arenicola M. E. Jones, Contr. West. Bot. No. 13: 2. 1910. 

 Linanthus mohavcnsis H. L. Mason, Madrono 4: 158. 1938. 

 Linanthus arenicola Jepson & Bailey in Jepson, Fl. Calif. 3: 205. 1943. 



Erect annual, 1-10 cm. high, stems compactly branched, glabrous to minutely puberulent. 

 Leaves 3- or rarely 5-cleft to above the base, rarely simple and entire, usually glabrous below, 

 pilose above ; cotyledons oblong ; flowers vespertine, solitary and sessile at the ends of the 

 branches or in the forks of the dichotomous cyme ; calyx cleft into linear somewhat unequal seg- 

 ments, glabrous below, somewhat hirsute above toward tips, sinuses about two-thirds filled with 

 a broad membrane, membrane growing with the capsule but at length split by it ; corolla yellow, 

 sometimes purple in throat, 5-7 mm. long, equaling or barely exceeding the calyx, at length 

 pushed out by the growing capsule ; stamens inserted on base of throat, included, filaments 

 glabrous; stigma included, lobes equaling style; capsule cylindric, equaling calyx, locules sev- 

 eral-seeded ; seeds reniform, strongly constricted at hilum. 



A gypsophilous species growing in scattered localities of the Mojave Desert and Death Valley, California, to 

 southern Utah. Type locality: "Needles, California." March-April. 



16. Linanthus Parryae (A Gray) Greene. Parry's Linanthus. Fig. 3941. 



Gilia Parryae A. Gray, Proc. Amer. Acad. 12: 76. 1876. 

 Gitia Kennedyi Porter, Bot. Gaz. 2: 77. 1877. 

 Navarretia Parryae Kuntze, Rev. Gen. PI. 2: 433. 1891. 

 Linanthus Parryae Greene, Pittonia 2: 256. 1892. 

 Dactylophyllum Parryae Heller, Muhlenbergia 2: 231. 1906. 



Erect annual, 2-10 cm. high, stems compactly branched, rarely openly branched, inter- 

 nodes short, usually concealed by leaves. Leaves 3-7-parted into linear lobes, 5-15 mm. long, 

 puberulent to hispidulous ; flowers sessile to subsessile in few-flowered cymes, bracts some- 

 what villous ; calyx deeply cleft into linear hyaline-margined lobes, membrane united only at 

 base forming a very short pseudotube; corolla funnelform, blue, white, cream or yellow, tube 

 included, about one-half as long as throat, lobes 6-12 mm. long, with a reniform crest at base, 

 margins sometimes erose-denticulate ; stamens inserted at junction of tube and throat, fila- 

 ments dilated at base, often with purple pigment; stigma exserted, exceeding anthers; capsule 

 obovoid, locules many-seeded. 



Sandy or gravelly soils, Sonoran Zones; deserts or semi-deserts from southeast Monterey County and Mono 

 County south through the Mojave Desert to the north side of the San Bernardino Mountains, California. Type 

 locality: "S.E. California, on desert plains near the head of the Mohave River." April-June. 



17. Linanthus bellus (A. Gray) Greene. Desert Beauty. Fig. 3942. 



Cilia bella A. Gray, Proc. Amer. Acad. 20: 301. 1885. 

 Navarretia bella Kuntze, Rev. Gen. PI. 2: 433. 1891. 

 Linanthus bellus Greene, Pittonia 2: 256. 1892. 

 Linanthus Peirsonii H. L. Mason, Madroiio 2: 23. 1931. 



Diffuse annual, 2-6 cm. high, stems filiform, wiry, cymosely branched from near the base, 

 internodes long, giving the impression of nakedness to plant. Leaves mostly 3-cleft, rarely 

 as much as 7-cleft or simple, sometimes the members of the pair connate at the base, lobes 

 thick, 1-3 mm. long, sparsely villous; flowers solitary or more rarely 1-3, sessile in bracteate 

 glomerules at the ends of filiform branches; calyx deeply cleft, the lobes margined to the tip 

 by a hyaline membrane, each lobe with a purple spot toward the base; corolla campanulate or 

 short-funnelform, 10-15 mm. long, lilac to pink, throat golden-yellow with a purple spot below 

 each lobe, lobes broadly obovate, truncate, margins entire or erose-denticulate; stamens in- 

 serted near base of throat, filaments glabrous; capsule subequaling the calyx. 



Sandy or gravelly soils, Lower Sonoran Zone; southeastern San Diego County and adjacent Imperial County. 

 California, south to Lower California. Type locality: "Hanson's Ranch, Lower California, near the boundary.' 

 April-May. 



