BORAGE FAMILY 559 



Scar elongate, with thick knife-like erect or inflexed margins; nutlets 

 glossy. 23. A. Cusicktt. 



Scar of nutlet in an areole longer than broad; nutlets symmetrical or nearly so. 

 Ventral keel not in a groove. 



Corolla 3-7 mm. broad; racemes bractless or nearly so. 



24. A. tenera. 



Corolla 1-3 mm. broad ; racemes bracteate more or less throughout. 



Scar suprabasal or nearly basal, oblique to the ventral keel. 



25. A. bracteata. 



Scar distinctly lateral, parallel with the ventral keel or nearly so. 

 Scar linear-oblong; nutlets usually muriculate or minutely 

 bristly. 26. A. hispidula. 



Scar ovate or deltoid; nutlets not muriculate or bristly. 



27. A. trachycarpa. 



Ventral keel in a conspicuous groove at least below middle. 



Nutlets with a thick bony pericarp, densely tuberculate and granulate. 



28. A. diffusa. 



Nutlets with a thin pericarp, tuberculate, or more commonly granulate. 



29. A. cahformca. 



1. Allocarya mollis (A. Gray) Greene. Downy Allocarya. Fig. 4222. 



Eritrichium molle A. Gray, Proc. Amer. Acad. 19: 89. 1883. 



Krynitzkia mollis A. Gray, op. cit. 20: 267. 1885. 



Allocarya mollis Greene, Pittonia 1: 20. 1887. 



Plagiobothrys mollis I. M. Johnston, Contr. Gray Herb. No. 68: 74. 1923. 



Perennial with a fleshy taproot, soft villous-tomentous throughout; stems usually many, 

 branched, 1-5 dm. long, ascending or trailing. Leaves numerous, opposite, linear or the lower 

 linear-spatulate ; racemes mostly solitary at the ends of the branches, naked or bracteate below; 

 mature calyx 4-5 mm. long, lobes lanceolate; corolla 5-10 mm. broad; nutlets ovoid, about 1.5 

 mm. long, gray, median keel distinct only near apex but occasionally extending to middle, trans- 

 verse ridges irregular, merging at their ends to form an indefinite lateral ridge or sometimes 

 represented by tubercles; scar conspicuous, ovate or triangular. 



Moist alkaline soils, Upper Sonoran and Arid Transition Zones; Klamath and Harney Counties, Oregon, 

 south to Modoc and Sierra Counties, California, and adjacent Nevada. Type locality: 'Sierra Valley, California, 

 on alkaline wet flats and borders of ponds." June-Aug. 



Allocarya mollis var. vestita (Greene) Jepson, Fl. W. Mid. Calif. 442. 1901. {Allocarya vestita Greene, 

 Erythea 3: 125. 1895; Plagiobothrys mollis var. vestitus I. M. Johnston, Contr. Gray Herb. No. 68: 75. 19^3.) 

 Plants more rank, usually decumbent; upper leaves alternate; racemes usually 2 at end of branches, bractless; 

 nutlets brown, more or less reticulate, the interspaces longer, somewhat granulate, lateral keels not evident. 

 Known only from a single collection by Congdon near Petaluma, Sonoma County, California. 



2. Allocarya scripta Greene. Scribe's Allocarya. Fig. 4223. 



Allocarya scripta Greene, Pittonia 1: 142. 1887. 



Plagiobothrys scriptus I. M. Johnston, Contr. Arnold Arb. No. 3: 27. 1932. 



Branches prostrate, 1-2 dm. long or sometimes much reduced and shorter than the basal 

 leaves, strigose. Leaves linear or narrowly oblanceolate, 5-20 mm. long, thinly strigose-hispi- 

 dulose especially in the midvein and margins; spikes leafy-bracteate, pedicels reflexed; calyx 

 accrescent, the lobes loosely erect, at length contorted ; corolla 2 mm. broad ; nutlets 2 mm. long, 

 deltoid-ovoid, acute, the dorsal side with fine white keel and reticulations, beset with tufts of 

 bristles, the areolae between large, dark-colored and finely papillate ; ventral side with a high thin 

 keel extending to the broad scar, this about one-fourth the length of nutlet and with a broad 

 dorsal pit surrounded by a prominent border or margin. 



A little-known species originally collected by Dr. Parry in 1887, locality not definitely known and again 

 at lone, Amador County. Eastwood, 1114, and near La Grange, Stanislaus County, Hoover 2053. Mr. Hoover 

 also found at La Grange a dwarf acaulescent form. March. 



3. Allocarya humistrata Greene. Dwarf Allocarya. Fig. 4224. 



Allocarya humistrata Greene, Pittonia 1: 16. 1887. 



Plagiobothrys humistratus I. M. Johnston, Contr. Gray Herb. No. 68: 77. 1923. 



Allocarya humistrata var. similis Jepson, Man. Fl. PI. Calif. 853. 1925. 



Allocarya limicola Piper, Contr. U.S. Nat. Herb. 22: 97. 1920. 



Allocarya sigillata Piper, loc. cit. 



Stems several from the base, mostly prostrate, rather stout, glabrous or sparsely puberulent. 

 Leaves linear, 1-2 cm. long; spikes 5-10 cm. long, rather remotely flowered in age; fruiting 

 pedicels stout, erect, or sometimes spreading or slightly deflexed ; calyx accrescent in fruit 

 and 6-10 mm. long, erect, sometimes all turned to one side forming a row; nutlets ovoid, sparsely 

 short-bristly and tuberculate on the dorsal side, keeled on the ventral side and sparingly rugulose ; 

 scar ovate-deltoid, subbasal. 



Low places especially in "hog wallows," Sonoran Zones; Livermore, Sacramento and San Joaquin Valleys. 

 Type locality: Antioch, California. March-May. 



