EVENING PRIMROSE FAMILY 425 
high, often with runners at base. Leaves very narrow lance-shaped, 
tapering at base to a flower stalk, 1 to 2 in. long, without teeth. Flowers 
in axils, petals pale yellow. Capsule a reversed 4-sided pyramid, longer 
than the calyx lobes. Swamps, New York and southward. June-Sept. 
4. L. hirtella, Raf. (Fig. 8, pl. 103.) Harry Lupwicta. Plant 
erect, 1 to 2 ft. high, decidedly hairy with stiff hairs. Leaves oblong, 
more or less egg-shaped, blunt at ends. Flower-stem in leaf-axil with 2 
bracts. Petals showy, yellow, longer than the sepals. Pod 4-angled, 
winged, nearly globular. Swamps, New Jersey and southward. June- 
July. 
5. L. alternifolia, L. (Fig. 7, pl. 103.) Seep Box. Erect, 2 to 3 
ft. high, not hairy. Leaves lance-shaped, sharp at each end, 2 to 4 in. 
long. Flower-stems at the axils, 2 bracted. Petals yellow, longer than 
the purple sepals. Pod 4-angled, winged. Swamps, Mass., to northern 
New York. 
z. ISNARDIA, L. 
General characters similar to those of Ludwigia, but leaves are opposite. 
I. palustris, L. (Fig. 4, pl. 103.) Marsan PuRsLANE. (Ludwigia 
palustris, Ell.) Plant, lying flat in the mud, floating or partly erect, 
branching, 4 to 15 in. long. Leaves oval or spatula-formed, tapering at 
base to a leaf-stalk 1/3 as long as the leaf. Flowers at the axils, small, 
solitary, without bracts below the calyx. Pod oblong, 4-angled. Stem 
and leaves reddish. Muddy ditches and swamps, generally distributed. 
June-Nov. 
3. CHAMAENERION, Adams. (Epilobium, L.) 
A single species, in our region which has been more generally known 
as the most conspicuous Epilobium. A showy herb with alternate leaves 
and perfect irregular flowers in terminal pyramidal clusters. Calyx tube 
adherent to the ovary, but not exceeding it in length, of 4 segments. Petals 
4. Capsule 4-celled, 4-angled. 
C. angustifolium, L. (Fig. 5, pl. 103.) Wirtow Hers. Simple, not 
branching, erect, 2 to 8 ft. high. Leaves lance-shaped, 2 to 6 in. long. 
Flowers purple, in a long pyramidal cluster, a small bract below each 
flower. Petals 4, unequal, sepals 4, seeds with silky down. In recently 
burned lands, along fences, a conspicuous herb in mid-summer. June- 
Sept. 
4. EPILOBIUM, L. 
Our species all herbs, with alternate or opposite leaves and with flowers 
in terminal clusters. Petals 4, sepals 4, the calyx tube adhering to the 
ovary and produced beyond the latter. Stamens 8. Ovary of 4 cells, 
capsules elongated, 4-angled. Seeds small, each with a tuft of silky hairs 
attached. Flowers purple or less frequently white. 
Plant densely hairy. 
Iblowersmabodty sr pit prOad.. 5, is) fe) Wer uel puto) 2's) | ey pad Ucn “Inston 
Flowers less than } in. broad . E. molle 
Plant not hairy or with few hairs, lower leaves broadly ‘oval and d opposite ‘Bb. alpinum 
eavesi nartowly linear 5s) s<) as c E: lineare 
Leaves lance-shaped. 
Without serrations at borders . . . . . . . E. palustre 
Borders serrated. 
Pods densely hairy . 2) ot) iene eeadenocaulon 
Pods only slightly hairy | tet chin a noma E. coloratum 
Pods free from hairs. . . . + + E. Hornemanni 
