374 BORAGINACEAE 



Eefs. — Plaqiobothrys shastensis Greene; Gray, Proo. Am. Acad. 20:284 (1885), type loc. 

 "valley at the base of Mt. Shasta" (probably Shasta Valley), Greene in 1876 (he was then at 

 Yreka) ; Jepson, Man. 855 (1925). 



5. P. fulvus Jtn. var. campestris Jtn. Stems 1 or several from the base, erect 

 and simple or brauohing only above, 1 to 2 feet high ; herbage hispid-hirsute ; roots, 

 petioles and midribs of leaves purple-dyed ; herbage spreading-hirsute, the stems 

 also puberulent; leaf-blades linear or lanceolate, l^ to 31/4 inches long ; spikes very 

 loose and bractless; calyx-lobes nearly distinct, lanceolate, more or less reddish even 

 in age, 2 to 3 lines long in fruit ; corolla 1 to 2 lines broad ; nutlets usually 4, 1^2 

 lines long, nearly 1 line wide, quadratish-ovate and abruptly short-acute, promi- 

 nently 3-keeled dorsally, the transverse rugae more or less interrupted and often 

 weak, the areolae finely papillate (or sometimes the spaces between the keels non- 

 rugose and nearly smooth) ; nutlets dorsally and ventrally somewhat flatfish, the 

 sides usually with a small rugose-margined area ; median dorsal keel continued 

 over the apex and prominently down the ventral side to the caruncle; caruncle 

 raised and ring-like, bordering a deep circular excavation. 



Gravelly soil of open hills and plains, 100 to 1500 feet : Sierra Nevada foothills 

 from Fresno Co. to Butte Co.; Sacramento Valley; middle and inner Coast Ranges 

 from Santa Clara Co. to Colusa Co. North to Oregon. Apr. -May. 



Locs. — Sierra Nevada foothills: Piedra, Fresno Co., Hoover 3925; Table Mt., Fresno Co., 

 Jepson 15,101; La Grange, Stanislaus Co., Hoover 3976; Folsom, e. Sacramento Co., Jepson 

 15,743 ; New York Eavine, Eldorado Co., K. Brandegee : Table Mt., n. of Oroville, Eeller 11,223. 

 Sacramento Valley: Vacaville, Jepson 21,147; Putah Creek bluffs, n. English Hills, nw. Solano 

 Co., Jepson 21,145 ; Colusa jet., K. Brandegee. Inner South Coast Range : Pacheco Pass ; Clayton, 

 Mt. Diablo, Hall 1693. Middle and inner North Coast Ranges: Howell Mt., Napa Range, Tracy 

 12,089; Venado (valley above), sw. Colusa Co., Jepson 16,258. 



Refs. — Plaqiobothrys fulvus Jtn., Contrib. Gray Herb. 68:70 (1923). Myosotis fulva 

 H. & A., Bot. Beech. 38 (1830), type loc. Concepcion, Chile, Bridges. Eritricbium fulvum A.DC, 

 Prodr. 10:132 (1846). P. rufescens F. & M., Ind. Sem. Hort. Petrop. 2:46 (1836), type from 

 Chile; Linnaea 11: Litt.-Ber. 116 (1837). Var. campestris Jtn., I.e. 70; Jepson, Man. 855 (1925). 

 P. calif ornicus Greene, Pitt. 2:231 (1892), "interior of California"; not P. calif ornicus Greene 

 (1887). P. campestris Greene, Pitt. 2:282 (1892), new name for P. californicus Greene (1892). 

 P. rufescens var. campestris Jepson, Fl. W. Mid. Cal. 446 (1901), ed. 2, 348 (1911). 



6. P. infectiviis Jtn. Stems several from the base and diffuse or 1 and erect, 

 6 to 14 inches high, spreading-hirsute; leaf-blades linear, 1 to 3% inches long, 

 ascending-hirsute, the midribs and margins purple-stained ; spikes at length very 

 loose and 4 to 6 inches long, leafy-bracteate throughout ; calj^x cleft to the base into 

 ovate-acute lobes, at first rusty-hirsute; corolla a little exserted from calyx, 1 to 

 lYo lines broad ; nutlets 4, ovate, dorsally 3-keeled, the keels and usually the ridges 

 bounding the areolae produced into a thin white narrow wing; dorsal side of nut- 

 lets white-tuberculate on a greenish ground and sometimes conspicuously muricate, 

 rarely areolate, the ventral side winged-areolate; lateral sides of nutlet usually with 

 a wing-margined plane area ; dorsal keel extended over apex into a ventral keel 

 ending at the median caruncle ; caruncle annular, bordering a hollow excavation. 



Heavy black adobe of open hills, 300 to 800 feet : inner North Coast Range in 

 Colusa and Yolo Cos. ; South Coast Ranges from the inner range in western San 

 Joaquin Co. to the middle range in San Luis Obispo Co. Mar .-Apr. 



Geog. note. — Plagiobothrys infectivus is recorded from western Yolo County and also from 

 Colusa County (Jour. Am. Arb. 20:381), where it was first collected by M. K. Curran, doubtless 

 near Venado (Mountain House), inner Coast Range foothills, in the southwestern part of the 

 county. Thence it extends southward along the inner Coast Range to San Luis Obispo County. 

 This species is only slightly known, both geographically and morphologically, but probably the 

 center of its distribution lies in the foothills on the east side of the Mount Hamilton Range. In 

 any event, here is found the most extreme or well-marked phase of the species morphologically. 

 Plagiobothrys infectivus is obviously related to P. fulvus var. campestris. In P. fulvus var. cam- 

 pestris, the nutlet, 3 keeled dorsally, is generally marked dorsally by regular rectangular areolae. 

 In P. infectivus the 3keeled nutlet seems essentially different from that of P. fulvus var. cam- 

 pestris. The dorsal keels in P. infectivus are whitish-winged, the wings thin and narrow but 

 prominent. The dorsal areas between the keels are only partially or irregularly areolate with 



