180 ONAttRACE.fi. (EVENING-PRIMROSE FAMILY.) 



SUIIORDER I. OIVAGRACEvE PROPER. 



1. EP1L.6BIUM, L. WILLOW-HERB. 



Cal} x-tube not prolonged beyond the ovary ; limb 4-cleft, deciduous. Petali 

 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, j urple, 

 or white flowers. (Name composed of cVi Ao/3o{) iW, viz. a violet on a pod.) 



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



mens c,f)d style turned to one side: stir/ma ivith 4 long lobes: b.arts scattered, 

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

 tall(4-7 e ); 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. alpinum, L. Low (2' -6' high); nearly glabrous; stems ascmdirg 

 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. ilia jus, Wahl. Taller ; upper leaves more or less acute and toothed ; 

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

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



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

 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, Muld. 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, /'>/<.?, 

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



4. E. HioEIc, Torr. Soft-downy al( over, strictly erect (l-2j high), at 

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

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

 to Michigan, and northward. Sept. 



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

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

 vblong, acute, denticulate, often petioled, *ot at all decurrent, thin, usm.'ly purple- 

 veined ; flower-buds erect; petals purplish, 2-cleft at the summit (!' 2" long), 



Wet places ; common. July -Sept. See addend. 



2. <E NO Til ERA, 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. 



