ONAGRACE^. 61 



Annual: stems round: leaves mostly alternate: petals obcordate 12, 13, 14 



spicatum, Lam. Simple stem often 5 or 6 ft. high: flowers spicate. 

 latifolium, Linn. Shorter, less erect, often branching: style glabrous. 

 obcordatum, Gr. Petals obcordate, spreading, rose-color. Alpine. 

 luteum, Pursh. Oregon to Alaska. 



Watsoni, Barbey. Hoary-pubescent, branching: petals narrow, obcordate. 

 COloratum, Muhl. Erect, branched, puberylent: leaves mostly opposite. 

 alpinum, L. Creeping, 2 to 6 inches high: flower-buds ovoid: anthers globose, 

 origanifolium, Lane. Taller: large petals obcordate, purple to white. 

 Franciscanum, Barb. Stems 2 to 4 ridged: petals purple, emarginate. 



brevistylum, Barb. Similar: petals smaller, obcordate, pinkish. S. N. Mts.* 



glaberimum, Barb. Glaucous: leaves connected at base: petals notched. 



paniculatum, Nutt. Often tall, very slender: leaves slender, often fascicled. 



jocundum, Gr. Similar: panicles crowded: petals larger, 6 lines long, deep 

 purple. 

 14. E. minutum, Lindl. Less than a ft. high: petals minute. 



5. GAYOPHYTUM, A. Jussieu. 

 ramosissimtun, T. & G. DiflFuse, 6 to 18 inches high: capsule 3-5-seeded. 

 racemosuna, T. & G. Less branched, more flowers, capsule 8 to 10 lines long. 

 p nmih iTn Wat-^ton. Smaller: capsule tJ lines long, the many seeds oblique. 

 diffi iRiim T. & G. Flowers li to 3 lines broad, usually pink: capsules on 

 pedicels. 



6. EULOBUS, Nuttall. 

 L E. Califomicus, Nutt. Stout, 1 to 3 ft. high: petals 4 or 5 lines broad, yellow. 



7. CENOTHERA, Linnaeus. 



§ Calyx-tube much prolonged beyond the ovary: stigma-lobes slender. 



Tall: flowers yellow, erect in bud: seeds in 2 rows in each cell 1 



Stenjs white: flowers white or purplish, li or 2 inches broad: buds nodding ... .2, 3, 4 



Stemless: calyx-tube 2 to 4 inches long: capsule wiug-angled 6 



§ 2. Calyx-tube filiform, stem-like above the ovary: stigma capitate: Jlowers yellow, sessile 

 on the top of a rootstoch in the axils of radical leaves. 



Nearly glabrous: leaves lanceolate to ovate: perennial 6, 7 



Canescently villous: leaves linear: capsule 4-winged: annual 8 



§ 3. Calyx-tube obconic or short-funne/Jorm: stigma capitate: capsules narrow, sessile or 



nearly so, often contorted. 



Flowers axillary, yellow: capsule sharply 4-angled, usually contorted 9, 10, 11 



Flowers axillary, small, yellow: capsule obtusely angled, curved 12, 13 



