MEMOIRS OP^ THE NEW YORK BOTANICAL GARDEN. I37 



* Allionia albida Walt. FL Car. 84 [111. Fl. i : 595]. 



Like Allionia linearis Pursh, but the leaves are broader and the 

 stem more pubescent above. In valleys, up to an altitude of 1500 m. 



Montana: Fridley, Park Co., 1887, Tweedy, ijj : Sand Coulee, 

 1885, R. S. Williams, 283; Lewis & Clarke Co., 1894, E, Doug- 

 las; Gallatin, 1882, Canhy ; Bull Mountain, 1882, Canby. 



Abronia fragrans Nutt. ; Hook. Kevv Journ. Bot. 5: 261 [Man. R. 



•M. 302; 111. Fl. i: 597]. 



On prairies, up to an altitude of 1500 m. 



Montana: Rochester Creek, 1888, Tzvecdv, 122. 

 Abronia micrantha (Torr.) Chois. ; DC. Prod. 13- : 436 [Man. R. 



M. 303 ; 111. PI. I : 597] ; Triftcridinui niieranthuni Torr. Frem. 



Rep. 96. 



In sandy soil, up to an altitude of 2000 m. 



Montana: Melrose, 1895, Rvdberg, 2630: Beaver Head Co., 

 1888, Tzvecdv, 121. 



* Abronia arenaria. 



Glandular-puberulent throughout; stem 3-4 dm. long, decumbent, 

 branched; petioles 2—4 cm. long; leaf blade 1.5-2 cm. long, oblong- 

 elliptic, obtuse, rather thick, densely and minutely glandular-puberu- 

 lent ; peduncles 3-4 cm. long, strict ; bracts generally five in num- 

 ber, membranous, 4-5 mm. long, oblong and acute ; flowers greenish 

 or yellowish white, numerous, about i cm. long, tubular-trumpet- 

 shaped with a small limb, densely puberulent ; fruit biturbinate, /. e., 

 tapering to both ends and narrowly rhombic in longitudinal secdon, 

 with about 5 low and rounded crests, densely glandular-puberulent. 



In the size and color of the flowers it resembles A. 7nic}-anlha,hui 

 the fruit places it nearest A. fragrans and A. fogonantha, from 

 which it differs in the small flowers and leaves and the pubescence. 

 It somewhat resembles A. elliptica Nelson, but that plant is less pu- 

 bescent and the fruit is described as quite different. A. arenaria 

 grows on sandy beaches. 



Yellowstone Park: Mouth of Pelican Creek, 1885, Tweedy, 

 442. 



PORTULACACEAE. 



Oreobroma Grayi (Britt.) ; Calandrinia -pygmaea Gray, Proc. Am. 

 Acad. 8: 623 [Man. R. M. 38; Bot. Cal. i: 75] not Muell. ; 

 Talinuni pxgniacum Gray, Amer. Jour. Sci. 33: 407; Calan- 

 drinia Grayi B\-\iion, Bull. Torr. Bot. Club, 17 : 312 ; Oreobroma 

 pygmaea Howell, Erythea, i : 33 ; Lezvisia pygmaea Robinson ; 

 A. Gray, Syn. Fl. i' : 268. 



