130 ONAttRACEJE. (EVENING-PRIMROSE FAMILY.) 



SUBORDER I. ONAGRACEJE PROPER. 



1. EPlLiOBIUUI, 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 eVi Xo/3ou <W, viz. a violet on apod.) 



* Flowers large in a long spike or raceme : petals widely spreading, on claws : sta 



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



1. E. angustifolium, 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. alpillllili, 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. lie ;i 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. lit 6 He, Torr. Soft-downy all over, strictly erect (l-2 high), at 

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

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

 to Michigan, and northward. Sept. 



5. E. COl or a. turn, Muhl. Glabrous or nearly so; stem roundish, not 

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

 oblong, acute, denticulate, often petioled, not at all decurrent, thin, usually purple- 

 veined ; 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-valvcd, many-seeded, 



