180 ONAGRACE^E. (EVENING-PRIMROSE FAMILY.) 



SUHORDER I. ONAGRACE^E PROPER. 



1. EPIEOBIUM, L. WILLOW-HERB. 



Calyx-tube not prolonged beyond the ovary ; limb 4-cleft, deciduous. Petals 

 4. Stamens 8 : anthers short. Pod linear, many-seeded. Seeds with a tuft of 

 long hairs at the end. Perennials, with nearly sessile leaves, and violet, purple, 

 or white flowers. (Name composed of eVri Xo/3ou tov, viz. a violet on apod.} 

 # Flowers large in a long spike or raceme : petals widely spreading, on claius : sta 

 mens and style turned to one side : stigma with 4 long lobes : leaves scattered. 



1. E. ansrustifolium, L. GREAT WILLOW-HERB.) Stem simple, 

 tall (4 -7); leaves lanceolate. Low grounds, especially in newly cleared 

 land; common northward. July. Flowers pink-purple, very showy. (Eu.) 

 *- * Flowers small, corymbed or panicled: petals, stamens, and style erect: stigma 



club-shaped: lower leaves opposite, entire or denticulate. 



2. E alpiliuniy L. Low (2' 6' high) ; nearly glabrous; stems ascending 

 from a stoloniferous base, simple; leaves elliptical or ovate-oblong, obtuse, 

 nearly entire, on short petioles ; flowers few or solitary, drooping in the bud ; 

 petals purple ; pods long, glabrous. Alpine summits of the White Mountains 

 of New Hampshire, and Adirondack Mountains, New York. (Eu.) 



Var. ill ft jus, Wahl. Taller ; upper leaves more or less acute and toothed ; 

 pod glabrous or somewhat pubescent. (E. alsinifolium, Vill. E. origanifoli- 

 um, Lam.) With the typical form. (Eu.) 



3. E. palustre, L., var. lineare. Erect and slender (l-2high), 

 branched above, minutely hoary-pubescent ; stem roundish ; leaves narrowly-lanceo- 

 late or linear, nearly entire ; flower-buds somewhat nodding ; petals purplish or 

 white; pods hoary. (E. lineare, Muhl. E. squamatum, Nutt.) Bogs,.N. Eng- 

 land to Penn., Wisconsin, and northward. There is also a small and simple 

 1 - few-flowered form (4' -9' high), less hoary or nearly glabrous, with shorter 

 leaves (E. oliganthum, Michx.), found in N. New York, White Mountains of 

 New Hampshire and northward. This is E. nutans, Sommerf. E. lineare, Fries, 

 but the pods are usually a little hoary. (Eu.) 



4. E. molle, Torr. Soft-downy all over, strictly erect (1- 2 J high), at 

 length branching; leaves crowded; linear-oblong or lanceolate, blunt, mostly peti- 

 oled ; petals rose-color, notched (2" -3" long). Bogs, Ehode Island and Penn 

 to Michigan, and northward. Sept. 



5. E. coloratura, Muhl. Glabrous or nearly so; stem roundish, not 

 angled, much branched (l-3 high), many-flowered; leaves lanceolate or ovate- 

 ot'long, acute, denticulate, often petioled, not at all decurrent, thin, usually purple- 

 vsined ; flower-buds erect; petals purplish, 2-cleft at the summit (l"-2" long). 

 Wet places ; common. July - Sept. 



2. CENOTHERA, L. EVENING PRIMROSE. 



Calyx-tube prolonged beyond the ovary, deciduous; the lobes 4, reflexed. 

 Petals 4. Stamens 8 : anthers mostly linear. Pod 4-valved, many-seeded, 



