600 ONAGRACEAE (EVENING PRIMROSE FAMILY) 



10. 0. linifblia Nutt. Annual or biennial, erect, very slender, simple or 

 diffuse, 1-4 dm. high, glabrous, the branchlets and capsules puberulent ; cauline 

 leaves linear-filiform, 1.5-4 cm. long, the radical oblanceolate ; spikes loosely 

 flowered, the bracts inconspicuous ; corolla 4-6 ram. long ; stigma-lobes short ; 

 pods obovoid to short-clavate, glandular-puberulent, 4-6 mm. long, not winged, 

 nearly sessile. (Kneiffia Spach.) Prairies and rocky hills, 111. to e. Kan., 

 Tex., and Ga. 



11. 0. pumila L. Perennial, puberulent, 1-6 dm. high ; leaves mostly gla- 

 brous, entire, obtuse or obtusisb, the basal spatulate, the cauline narrowly 

 oblanceolate to lanceolate; spikes loose, at first nodding; petals 5-10 mm. 

 long ; pods obscurely glandular-puberulent, clavate, 6-12 mm. long, sessile or 

 shortly pediceled, slightly winged. (Kneiffia Spach.) Open places, e. Que 

 to Man., 8. to Wise., O. , and in the mts. to Ga. ; common. 



12. 0. glauca Michx. Perennial, erect, 5-9 dm. high, glabrous and glau- 

 cous ; leaves ovate to ovate-oblong, 5-10 cm. long, repand-denticulate ; flowers 

 in short leafy corymbs; petals 2.5-3.5 cm. long; capsule glabrous, glaucous, 

 ovoid-ellipsoid, broadly winged, rather abruptly contracted at base. (Kneiffia 

 Spach.) Mts., Va., Ky., and southw. 



13. 0. fruticbsa L. (SUNDROPS.) Perennial, erect, 3-9 dm. high, puberu- 

 lent or nearly glabrous; leaves oblong- to linear-lanceolate, mostly denticulate, 

 ciliolate ; spikes short narrow-bracted, usually on naked peduncles ; petals 

 1.4-2.6 cm. long ; capsule glabrous or sparingly glandular-puberulent, ellipsoid 

 to slightly clavate, winged. (Kneiffia Raimann.) Dry sandy soil, s. N. E. to 

 S. C. ; also O., Mich., and Ind. Var. HIRSUTA Nutt. Stem spreading-pilose ; 

 the leaves also with more copious and looser pubescence. (Kneiffia fruticosa, 

 var. pilosella Britton. ) In similar situations and extending northeastw. to 

 centr. Me. 



14. 0. linearis Michx. Erect, puberulent, 29 dm. high ; leaves linear to 

 narrowly oblanceolate, entire or nearly so, minutely puberulent ; petals 1.2-3 

 cm. long ; capsule clavate, 6-10 mm. long, canescent with fine incurved glandless 

 hairs, on a pedicel usually as long as itself. (Kneiffia Spach ; 0. fruticosa, 

 var. Wats.) Meadows and open woods, along the coast, e. Mass, to Fla. and 

 Ala. ; also Ark. and Mo. 0. fruticosa, var. humifusa Allen (Kneiffia Alleni 

 Small) appears to be merely a stunted decumbent or sprawling form growing in 

 sterile sands (L. L, etc.) and smaller in all its parts. Var. EAM&SII Robinson. 

 Decumbent; leaves elliptical, the larger ones 2.7 cm. long, 11 mm. wide. 

 Sandy shore of a salt pond, Stratford, Ct. (Eames). 



15. 0. longipedicellata (Small) Robinson. Perennial, erect and subsimple, 

 2-6 dm. high (rarely bushy-branched and sprawling), short-hirsute; capsule as 

 in the preceding, but spreading-hirsute ; the pedicels of variable length, the 

 lowest often exceeding the fruit. (Kneiffia Small.) Low ground, near the 

 coast, Ct. to Fla. 



16. 0. pratSnsis (Small) Robinson. Perennial, erect or nearly so, 3-6 dm. 

 high; stems covered with soft long widely spreading hairs; leaves oblong- 

 lanceolate, 1-2 cm. broad, somewhat hirsute on both faces ; lower flowers in 

 the axils of decidedly foliaceous bracts ; calyx with conspicuous caudiform 

 free green densely hispid tips, the limb considerably shorter than the tube ; 

 petals 1.5-2.5 cm. long ; capsule clavate, sessile, hispid-pilose. (Kneiffia Small.) 

 Low grounds, s. Me. to Ct. ; n. w. Pa. to la. and Ark. 



4. HARTNfANNIA (Spach) Endl. Stigma-lobes linear; flowers white or 

 rose-colored, nodding in bud ; fruit short, obovoid to ellipsoid, 4-angled and 

 strongly ribbed; caulescent. 



17. 0. specibsa Nutt. (WHITE E.) Perennial, erect or subdecumbent, 

 puberulent ; leaves oblong-lanceolate to linear, repand-denticulate or more or 

 less deeply sinuate-pinnatifid ; petals 2.5-4 cm. long ; capsule clavate-obovoid, 

 strongly 8-ribbed, rigid, acute, stoutly pediceled. (Hartmannia Small.) 

 Prairies and plains, Mo. and Kan. to Tex., spreading eastw. into 111., S. C., 

 and Ga. 



