BORAGE FAMILY 573 



Plagiobothrys Kingii var. Harknessii (Greene) Jepson, Man Fl PI. Calif. 856. 1925 iSonnea Hark- 

 ncssii Greene, Pittonia 1:23. 1887; Plagiobothrys Harkncssti Nels. & Macbr. Bot. Gaz. 62:143. 1916.) 

 Racemes short and conglomerate, or a few scattering ones loosely flowered and longer; scar of nutlet elongated 

 and extending nearly the whole length of the ventral keel. Southeastern Oregon, Malheur County, south through 

 western Nevada to Mono Lake and Owens Lake, California. Type locality: Mono Lake, California. 



2. Plagiobothrys Jonesii A. Gray. Jones' Plagiobothrys, Fig. 4253. 



Plagiobothrys Jonesii A. Gray, Syn. Fl. N. Amer. ed. 2. 2^: 430. 1886. 

 Sonnca Jonesii Greene, Pittonia 1 : 23. 1887. 



Stems erect, 1 to several from the base, divergently branched, 1-3 dm. high, hispid with 

 spreading bristly hairs pustulate at base, and also retrorse-puberulent. Basal leaves linear or 

 narrowly oblanceolate, cauline mostly lanceolate with pubescence similar to stem but thinner; 

 racemes terminating the branches, mostly conspicuously leafy-bracted at base, 1.5-3 cm. long, 

 the lower leaves of the branches often bearing one or few axillary flowers ; calyx-lobes subulate- 

 linear, 6-8 mm. long ; corolla 1-2 mm. broad ; nutlets 3 mm. long, incurved and 4-angled by the 

 dorsal and ventral keels and the 2 lateral ridges, abruptly pointed at apex, the keel and lateral 

 angles tuberculate, the concave surface between densely tessellate ; scar narrow or medial- 

 „narrow merging into the keel above, and with a diverging lateral ridge extending to either side. 



Washes and rocky slopes of the deserts, Sonoran Zones, Inyo County south to the Whipple Mountains, San 

 Bernardino County, California. Type locality: Needles, California. April-May. 



3. Plagiobothrys hispidus A. Gray. Bristly Popcorn Flower. Fig. 4254. 



Plagiobothrys hispidus A. Gray, Proc. Amer. Acad. 20: 286. 1885. 

 Sonnea hispida Greene, Pittonia 1: 22. 1887. 



Stems solitary and few-branched above, to several and much-branched, 5-20 cm. high, hispid 

 and sparsely tomentulose. Leaves hispid with ascending hairs slightly pustulate at base, the 

 surface green and without finer pubescence, lower linear, 1.5-2.5 cm. long, upper lanceolate, 

 sometimes broadly so, 0.5-2 cm. long, obtuse; flowers in small terminal glomerate clusters and 

 also sometimes solitary in the axils; calyx-lobes lanceolate, somewhat closed over the nutlets, 

 about 2 mm. long ; corolla 1 mm. broad ; nutlets usually solitary, only 1 mm. long, ovoid, tuber- 

 culate, strongly ribbed dorsally and on the angles ; scar a little above the middle tapering into 

 the sharp keel above, the ventral surface densely tuberculate below the scar, nearly smooth above. 



Sandy and gravelly soils. Arid Transition and Canadian Zones; Deschutes County, Oregon, southward east 

 of the Cascades and the Sierra Nevada, to Mono County, California, and western Nevada. Type locality: 

 Truckee, California. June-Aug. 



4. Plagiobothrys arizonicus (A. Gray) Greene. Arizona Popcorn Flower. 



Fig. 4255. 



Eritrichium canescens var. arizonicutn A. Gray, Proc. Amer. Acad. 17: 227. 1882. 

 Plagiobothrys arizonicus Greene ex A. Gray, op. cit. 20: 284. 1885. 



Stems slender, several from the base, ascending, simple or few-branched, 1-4 dm. high, hir- 

 sute-hispid with spreading hairs and also rather sparingly villous-pubescent. i Leaves hirsute- 

 hispid with more or less appressed hairs, pustulate at base, without shorter pubescence, the 

 lower Hnear-oblanceolate, 1.5-5 cm. long, upper linear-oblong to lanceolate; roots, lower parts 

 of stems and veins of the leaves, or sometimes the whole plant, purplish ; spikes at length elon- 

 gated, remotely flowered and bractless or with a few foliaceous bracts ; calyx about 3 mm. long, 

 cleft to about the middle, lobes narrow-attenuate, connivent, hirsute-hispid, the tube at length 

 usually circumscissile near the base; corolla 2-2.5 mm. broad; nutlets 1-4 commonly 2, ovoid 

 and abruptly acute at apex, median and lateral keels often tuberculate, and with connecting 

 transverse rugae, the aerolae between smooth or minutely papillate; scar median, seated in a 

 sunken area at the base of the keel. 



Gravelly or sandy soils. Upper Sonoran Zone; Inner Coast Ranges and San Joaquin Valley, south to the 

 Tehachapi Mountains, and mostly on the desert slopes to San Diego County, California, east to New Mexico and 

 Sonora. Type locality: "Arizona, Greene, Pringle." March-June. 



Plagiobothrys arizonicus var. catalinensis A. Gray, Syn. Fl. N. Amer. ed. 2. 2^: 431. 1886. (Plagiobothrys 

 canescens var. catalinensis Jepson, Man. Fl. PI. Calif. 856. 1925; P. catalinensis J. F. Macbride, Proc. Amer. 

 Acad. 51: 546. 1916.) Closely resembling the typical species but calyx-lobes variable on the same plant, some 

 distinctly connivent over the mature nutlets, others on another branch of the same plant only slightly connivent, 

 suggesting a possible hybrid origin between P. canescens and P. arizonicus. Santa Catalina and San Clemente 

 Islands, California. Type locality: "Santa Catalina Island, off Los Angeles, California." 



5. Plagiobothrys nothofulvus A. Gray. Rusty Popcorn Flower. Fig. 4256. 



Eritrichium nothofulvum A. Gray, Proc. Amer. Acad. 17: 227. 1882. 

 Plagiobothrys nothofulvus A. Gray, op. cit. 20: 285. 1885. 



Stems 1 to several from the base, erect or ascending, 2-4 dm. high, villous-tomentose with 

 spreading hairs. Basal leaves oblanceolate, 3-10 cm. long, 5-15 mm. wide, acute at apex, sparsely 

 villous, cauline leaves few, linear-lanceolate ; roots, bases of the stems and the margins and 

 midrib of the leaves purple-stained ; spikes on terminal once- or twice-forked branches, usually 

 without foliaceous bracts, at length elongated and loosely flowered ; calyx densely appressed- 

 hirsute, the hairs, especially on the lobes, rusty-colored, 2-3 mm. long in fruit, the lobes erect 

 about as long as the tube, this at length circumscissile near the base ; corolla 6-8 mm. broad ; 



