160 



POLEMONIACEAE 



v'IpF' 



N ', 



Biol. note. — Variability in branching or the lack of it characterizes Nararretia viscidula to 

 some considerable degree. Most commonly it is 3 to 5 inches high and divaricately branched, 

 though sometimes the stem is simple. Under favorable soil conditions this divaricate type of 

 branching becomes highly developed, as on the rich loam soil of alluvial fans at mouths of caiions. 

 In such habitats luxuriant states are produced; the stems are several from the base, -n-idely diver- 

 gent or decumbent and form plants 10 to 15 inches broad, with peduncle-like divaricate branches 

 terminating usually in a single head. Plants of this sort (Gates Canon, Vaca Mts., Jepson 15,033) 

 in habit and aspect recall vigorous plants of Trifolium tridentatum. 



Under unfavorable moisture and soil conditions of a given season, extensive colonies are 

 reduced to dwarfs 1 or 2 inches high with a single unbranched axis and one terminal head of 

 flowers. The rolling foothills between Valley Springs and Burson, Calaveras County, provide a 



characteristic habitat for this dwarf state, which, in the 

 latter half of May, occurs so abundantly on the very hard 

 gravelly red soil as to impart a red-purple flush to the 

 country — a vegetation stand all the more marked since 

 usually consisting, at this season, of only this species. 



Locs. — Coast Ranges: Alder Point, Humboldt Co., 

 Tracy 4732; White Thorn Valley, s. Humboldt Co., Tracy 

 5036; betw. Potter Valley and Travelers Home, Mendo- 

 cino Co., Jepson 20,954; Windsor, Sonoma Co., Jepson 

 9298; St. Helena, Jepson 2347; Gates Canon, Vaca Mts., 

 Jepson 15,033; Cordelia, v.: Solano Co., Jepson 1741; 

 Shellville, s. Sonoma Co., Bioletti ; Ross Valley, Marin 

 Co., Jepson 15,029. Contra Costa Co.: Walnut Creek, 

 Greene. Sacramento Valley: Hawes ranch, lower Cow 

 Creek, Shasta Co., Blartlinship ; Cottonwood, Shasta Co., 

 Howell 12,232; Jellys Ferry, Tehama Co., Jepson 18,981; 

 Chico (5 mi. n.), Heller 11,427; Cannon sta., Solano Co., 

 Jepson 15,034. Sierra Nevada foothills and the near bor- 

 ders of the Great Valley plain: Auburn, Placer Co., K. 

 Brandegee ; betw. Salmon Falls and Pilot Hill, Eldorado 

 Co., K. Brandegee ; lone, Amador Co., Hoover 2422 ; Bur- 

 son, Calaveras Co., Jepson 9938; Columbia, Tuolumne 

 Co., Chesnut 4" Drew; La Grange, Stanislaus Co., Jepson 

 15,030 ; Snelling, Merced Co., Hoover 592 ; Sanger, Fresno 

 Co., Condit; Rogers Valley, n. of Auberry, Fresno Co., 

 Jepson 12,880 ; Sand Creek Valley, e. of Orange Cove, 

 Tulare Co., Hoover 2580 ; Watson Spr., North Fork Ka- 

 weah River, Jepson 583 ; Middle Tule River, Tulare Co., 

 Purpus 5612. 



Ref s. — Navarretia viscmtrLA Benth., PI. Hartw. 324 

 (1848), type loc. "in montibus Sacramento" (that is, un- 

 doubtedly, in n. Sierra Nevada foothills), Hartweg 388; 

 Jepson, Man. 791, fig. 770 (1925). Gilia viscidula Gray, 

 Proc. Am. Acad. 8:271 (1870) ; Jepson, Fl. W. Mid. Cal. 429 (1901), ed. 2, 333 (1911). N. pur- 

 purea Greene; Brand in Engler, Pflzr. 4"'': 156 (1907), type loc. Middle Fork, Amador Co., Hansen 

 130. N. riscidida var. purpurea Jepson, Man. 792 (1925). (?) N. macgregorii Brand, Ann. 

 Conserv. et Jard. Bot. Geneve 15-16:339 (1913), type loc. Water Canon, Tehachapi Mts., Abram-s 

 ^ McGregor 498; teeth of bracts hyaline-margined; calyx-tube hyaline (ex char.). 



Fig. 377. Navarretia viscidula 

 Benth. o, habit, X 1 ; 6, bract, X 2 ; 

 c, long. sect, of fl., X 2. 



5. HUGELIA Benth. 



Herbs lauate when young;, not at all glandular. Leaves or their simple divisions 

 linear or filiform and rigid. Flowers crowded into capitate leafy-bracted clusters. 

 Bracts 3 to 5-cleft, these and the calyces densely woollj^-matted. Calyx-lobes sub- 

 ulate, pungent. Corolla salverform. Stamens commonly exserted ; anthers deeply 

 sagittate. Capsule many-seeded or in some species 3 to 6-seeded. Seed-coats chang- 

 ing under water.- — Species 9, western North America. (Baron Charles de Hugel 

 of Vienna. ) 



Tax. note.- — The genus Hugelia Benth. was published in the Botanical Register (sub t. 1622) 

 in 1833. It has a prior homonym in Hugelia Rcichenb., a genus of Umbelliferae, published in 

 Reichenbaeh's Conspectus Regni Vegetabilis in 1828 and now referred to Didiscus by Engler and 

 Prantl (Nat. Pflzfam. 3':120, — 1898). The only other name available for this Polemoniaceous 

 genus is Welwitschia Reichenb. (1837), but its homonym, Welwitsehia Hook. (1862), has been 

 conserved under the International Rules of Nomenclature for a South African Guetaceous genus 



