600 ONAGBACEAE (EVENING PRIMROSE FAMILY) 



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

 difinse, 1-4 dm. high, glabrous, the brauohlets and capsules puberulent ; cauUne 

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

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

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

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

 Tex., and Ga. 



11. 0. piimila 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., s. 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. {Kneiffla 

 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 Uaimann.) — Dry sandy soil, s. N. E. to 

 S. C. ; also O., Mich., and Ind. Var. HiKsijTA 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 Miohx. Erect, puberulent, 2-9 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. I., etc.) and smaller in all its parts. Var. EAMi;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. longipediceimta (Small) Robinson. Perennial, erect and subsimple, 

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

 in the preeeding, 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. pratfinsis (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. HARTMANNIA (Spach) Endl; Stigma-lobes linear ; flowers white or 

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

 strongly ribbed ; caulescent. 



17. 0. speciftsa 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 KSn- to Tex., spreading eastw, into 111., S. C., 

 and Ga- 



