PIPTOCALYX BOR AGIN AGE M 483 



EREMOCARYA 



* * * Perennial by creeping and rooting stems: flowers middle-sized. 



A. mollis Greene 1. c. 20. Krynitzkia mollis Gray. Copiously soft- 

 villous, even to the calyx : stems rather stout, spreading or ascending, at 

 length a foot or more long: leaves linear-Ungulate, 2-3 inches long by 3-4 

 lines broad, obtuse: racemes at length elongated, bractless: limb of the 

 corolla 3-4 lines broad: nutlets trigonous ovate, slightly obcompressed, 

 hardly at all carinate on the back, coarsely rugose-areolate, attached bv a 

 quarter or a third of their length to an oblong-pyramidal gynobase, the 

 scar ovate-lanceolate. Borders of alkaline ponds, southeastern Oregon to 

 California. 



8 PIPTOCALYX Torrey Bot. Wilkes 414, t. 12. 



Small dichotomously branched annuals with narrow leaves and 

 small dowers sessile in the forks or in the axils of leaves or 

 bracts. The root giving a deep purple stain. Calyx early cir- 

 cumscissile, the 5-cleft upper portion falling away, leaving the 

 membranaceous base persistent around the fruit. Pedicels veiy 

 short, persistent. Corolla with naked and open throat, the tube 

 not surpassing the calyx. Anthers mucronate, included. Fruit 

 of 4 rather distinctly margined nutlets. 



P. circumscissus Torrey 1. c. Krynitzkia circvmscissa Gray Hispid- 

 canescent throughout: stem 1-4 inches high, densely branched from the 

 base: leaves linear or the lowest spatulate, 3-6 lines long, crowded on the 

 upper part of the branches : calyx hispid, its linear lobes foliaceotis, about 

 a line long: limb of the white corolla about a line broad: nutlets oblonn- 

 ovate, not carinate, smooth or minutely tuberculate, attached for nearly 

 their whole length to the pyramidal-subulate gynobase, the ventral groove 

 narrow and divaricately forked at the base. On dry sandy plains, eastern 

 Oregon to Brit. Columbia, California and Arizona. 



9 EREMOCARYA Greene Pitt, i, 58. 



Hirsute-canescent small annual herbs with chiefly radical 

 leaves in rosulate tufts and small white flowers on persistent ped- 

 icels in dense leafy-bracted geminate racemes: the root giving a 

 deep purple stain. Calyx 5-parted to the base, in fruit campanu- 

 ulate, persistent : the segments nerveless and not bristly-hispid. 

 Style enlarged in fruit and persistent. Nutlets neither margined 

 nor carinate, erect, attached for their whole length to a slender 

 columnar gynobase by a groove that does not fork nor enlarge at 

 base, smooth or papillose-scabrous. 



E. micrantha Greene 1. c. Krynitzkia micrantha Gray. Hirsute- 

 canescent : stem slender, 2-5 inches high, at length diffusely branched, the 

 numerous racemous branches repeatedly dichotomous and copiously leafy- 

 bracted : leaves linear, 2-4 lines long: racemes mostly geminate with a 

 flower in the fork, 4-6 lines long, densely flowered : corolla barely a line 

 high, and its lobes %-% of a line long, obscurely appendaged in the throat : 

 style becoming thicker than the gynobase, or even pyramidal ; nutlets 

 oblong-ovate, acute or acuminate, smooth and shining or dull and punc- 

 ticulate. Dry plains, southeastern Oregon to California, Utah and Arizona- 



10 PLAGIOBOTHRYS Fischer & Meyer Ind. Sem. Hort. Petrop. ii. 49. 



Usually rather slender soft-pubescent annuals with most of 

 their leaves in a close radical tuft, and rather small white flowers 



