572 LOASACEAE 



r 



15 cm long; flowers vespertine; petals 2 cm. long, oblanceolate, sometimes whit- 

 ish without, golden yellow withm; staminodia about half their size; capsule fully 

 2 cm. long M. aurea and M. speciosa Osterhout. Hills and dry valleys: Colo. 

 — Wyo. Submont.—Mont. Jl-Au. 



chrysantha 



3-4 



feiemb siout, wnite-pubescent, much branched; lower leaves 10-15 cm. long, 

 , -?on °^ oblanceolate; upper leaves broadly lanceolate, or even ovate; petals 

 lo-ZU mm. ong oblanceolate; staminodia similar; capsule 2.5-3 cm. long. T. 

 sxnuata Rydb. N. sinimta Daniels. Canons: Colo. Submont. S. 



13. N. Rusbyi (Wooton) Rydb. Erect biennial; stem stout, scabrous, 1-1.5 



igul 



with tri- 



. \ ^™ ' now ers wim two pinnatihd bracts ; petals hght yellow, oblanceolate, 

 acute, lb-20 mm. long; petaloid staminodia narrower and shorter; capsule 3 cm. 



W ^^^.*^ the base ; seeds winged. M. Rusbyi Wooton. Plains and valleys: 

 N.M.— Wyo.— Ariz. Son.—Submont. Je-S. 



1 ,^*- *^. nuda (Pursh) Greene. Stout perennial or biennial; leaves oblance- 

 olate, 5-15 cm. long, smuately lobed, with oblong or ovate lobes, less hispid 

 apove; petals spatulate, acute, about 2 cm. long; staminodia nearly as large, 

 similar; capsule about 3 cm. long; seeds winged. Barlonia nuda Pursh. M. 

 nuaa 1. & G. piams and hillsides: w Neb.— Colo.— Wyo. PlainSubmonL 



16. N. stricta (Osterhout) Greene. Strict, rather simple perennial; stem 



5-10 



triangul 



•' I 1 • j' — . "*""&'^^'»' uccuii, petms ouiaiiceoiaie, acuxe, z.o-cs.o mm. 

 long, petaloid staminodia similar; capsule 2-3 cm. long; seeds wing-margined. 

 H esper aster _stnctus Osterhout. Plains and foot-hills: w Neb.— Tex.— Colo.— 



5-10 



Wyo. Plain — Submont. Je-0. 



16. N. decapetala (Pursh) Greene, otuui uienmai, siem o-iu am. mgii, 



leaty, very scabrous; lower leaves oblanceolate, 1-3 dm. long, the upper lanceolate, 



pmnately lobed, with lanceolate lobes; flowers subtended by several pinnatifid 



Di-acts; petals 4-5 cm. long, oblanceolate, acute; petaloid staminodia ahnost as 



large, capsule about 4 cm. long; seeds with a narrow wing. Bartonia decapetala 



Pursh. M ornata T. & G. Canons: S.D.— Tex.^Nev.— Alta. Plain— Sub- 

 mont. Jl-S. 



■ 17. N. laevicaulis (Dougl.) Greene. Stout biennial; stem 3-10 dm. high; 

 lower leaves oblanceolate, sinuately dentate, with triangular teeth, 1-1.5 cm. 

 long upper stem-leaves ovate-lanceolate, densely scabrous; flowers diurnal, sub- 

 tended by toothed bracts; petals narrowly oblanceolate, 5-6 cm. long; seeds 

 wmg-margined. Bartonia laevicaulis Dougl. M. laevicaulis T. & G. Canons 

 and river valleys : Wash.— Ida.— Utah— Calif. Son.— Submont. Je-Au. 



18. N. acuminata Rydb. Stout biennial; stem 3-10 dm. high, straw- 

 colored; lower leaves oblanceolate, 1-2 dm. long, sinuately dentate, densely 

 scabrous with triangular teeth; upper stem-leaves lanceolate, pinnatifid, with 

 lanceolate or rarely triangular lobes; flowers diurnal, their bracts narrowly linear, 

 entire or with a few narrow lobes; capsule 4 cm. long; seeds winged. River 

 valleys: Wash.— Mont.— Wyo.— Utah. Son.—Submont J^S. 



19. N. parviflora (Dougl.) Greene. Divaricately branched biennial; stem 

 ^ +jf ' ir^'^'" %^ oblanceolate, coarsely sinuately toothed, with triangular 

 teeth, the upper lanceolate; flowers diurnal; bracts narrowly linear, mostly 

 entu-e; petals oblanceolate, 2.5-3 cm. long; capsule about 2 cm. long; seeds 



Z^^^r ^""'^^ P^^^ifiora Dougl. (?) M. Brandegei S. Wats. Along rivers: 

 B.C.— Wash.— Ore. Son.—Submont. Je-Jl. 



3. ACROLASIA Presl. 



Scabrous pubescent annuals. Leaves alternate, rarely some opposite, nar- 

 row, trom entire to pmnatifid. Sepals 5, persistent. Petals 5, yellow, rather 

 mconspicuous. Stamens many, free, or nearly so; filaments filiform. Hypan- 



