——————— eS CC mL 
_brous or often finely pubescent above, 2°-8° 
Vor, II.] EVENING-PRIMROSE FAMILY. 481 
1. Chamaenerion angustifolium (L,.) Scop. Great or Spiked Willow-herb. 
Fire-weed. (Fig. 2566.) 
Epilobium angustifolium U,. Sp. Pl. 347. 1753. 
C. angustifolium Scop. F1).Carn. Ed.2,1: 271.1772. 
Epilobtum spicatum Lam. Fl. Fr. 3: 482. 1778. 
Erect, rather stout, simple or branched, gla- 
high. Leaves alternate, very short-petioled, 
lanceolate, entire or denticulate, 2’-6’ long, 
4//-12’ wide, pale beneath, acute at the apex, 
narrowed at the base, thin, the lateral veins 
confluent in marginal loops; flowers 8//-15/’ 
broad, purple, or sometimes white, in elon- 
gated terminal spike-like racemes; bracts 
mostly shorter than the pedicels; petals entire; 
style pubescent at the base; stigma 4-lobed; cap- 
sules 2/—3/ long, about 114’ thick, finely canes- 
cent, at least when young; seeds about 4” long, 
smooth, or nearly so, the coma long, whitish. 
In dry soil, Labrador to Alaska, south to North 
Carolina, Kansas, in the Rocky Mountains to Ari- 
zona, and on the Pacific Coast to California. Also 
in Europeand Asia. Often appears in abundance 
after forest fires. June-Sept. 
2. Chamaenerion latifolium (L.) 
Sweet. Broad-leaved Willow- 
herb. (Fig. 2567.) 
Epilobium latifolium V,. Sp. Pl. 347. 1753. 
Chamaenerion latifolium Sweet, Hort. Brit. Ed. 
2, 198. 1830. 
Erect, usually branching, glabrate below, 
often quite canescent above, 6/-18’ high. 
Leaves mostly sessile, 1/—2’ long, 2’’-6/’ wide, 
denticulate or entire, lanceolate or ovate-lan- 
ceolate, acutish at both ends, thick, those of the 
branches opposite, the veins inconspicuous; 
flowers purple, 1/-2’ broad, in mainly short 
leafy-bracted racemes; petals entire; styles gla- 
brous; stigma 4-lobed; capsules %/-114/ long, 
about 11%4’’ thick, canescent; seeds about 1/7 
long, smooth or nearly so; coma elongated, 
whitish. 
Moist ground, Newfoundland to Alaska, south 
to Quebec, Colorado and Oregon, Also in Europe 
and Asia. June-Aug. 
6. EPILOBIUM IL. Sp. Pl. 347. 1753. 
Herbs, or sometimes shrubby plants, with alternate or opposite leaves, and axillary 
or (terminal, solitary, spicate or racemose flowers. Calyx-tube linear, produced beyond 
the ovary, the limb 4-parted, deciduous. Petals 4, mostly obovate or obcordate. Stamens 
8; anthers oblong or linear, short. Ovary 4-celled; united styles slender or filiform; stigma 
club-shaped or 4-lobed; ovules numerous. Capsule narrow, elongated, 4-sided, 4-celled, 
loculicidally dehiscent by 4 valves. Seeds small, numerous, with a tuft of hairs (coma) at 
the summit. [Greek, upon a pod, flower and pod appearing together. ] 
About 65 species, of wide geographic distribution, most abundant in temperate regions. Besides 
the following, about 3o others occur in the western and northwestern parts of North America, 
Stigma deeply 4-lobed; flowers large. 1. £. hirsutum. 
Stigma entire, or merely notched. 
Seeds smooth or nearly so; arctic or alpine species. 
Flowers white; leaves usually denticulate. 2. EF. alpinum, 
Flowers violet; leaves mostly entire. 3. &. anagallidifolium, 
Seeds papillose. 
Leaves linear or lanceolate, entire or nearly so. 
Plants crisp-pubescent or canescent. 
Leaves sessile, mostly obtuse. 4. £. palustre. 
Leaves petioled, very narrow, acute. 5. £. lineare. 
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