EVENING PRIMROSE FAMILY. 181 



1. EFH.OBIUM, WILLOW-HERB. (Three Greek words meaning 

 violet on a pod.) Flowers summer. The pods opening give to the 

 winds great numbers of the downy-tufted seeds. 2/ 



* Flowers large and showy, in a long spike or raceme, the widely spread- 

 ing petals on short claws, the stamens and long style bent downwards, 

 and the stigma of 4 long lobes; lower leaves alternate. 



E. angustif61ium. Linn. GREAT W. or FIREWEED. One of the 

 plants that spring up abundantly, everywhere northward, where forests 

 have been newly cleared and the ground burned over ; tall (4-7 high) 

 and simple-s,temmed, smooth, with lanceolate leaves, and a long succes- 

 sion of pink-purple flowers. 



* * Flowers small (save in the first} in corymbs or panicles terminating 

 the branches, with petals, stamens, and style erect, and all the lower 

 leaves opposite ; stem l-2 high. 



- Stigma 4-parted ; flowers showy. 



E. hirsutum, Linn. Nat. from Eu. in E. States, and sometimes 

 cult. ; a stout branching plant 3-6 high, densely sofl^hairy ; leaves 

 mostly opposite and lance-oblong, finely serrate ; flowers bright purple, 

 about 1' across, in a loose, leafy, terminal raceme. 



t- <- Stigma clavate ; flowers small and mostly rather inconspicuous. 



M- Leaves more or less revolute, small and narrow, entire or very nearly 

 so. All in bogs N. 



E. paliistre, Linn. Slender and low (6'-12' high), often simple, 

 finely pubescent, the stem more or less angled or marked with hairy 

 lines; leaves erect or ascending, equaling the nodes, sessile, linear or 

 elliptic-oblong and obtuse ; capsules either pubescent or nearly glabrous, 

 mostly shorter than the slender peduncles. 



E. lineare. Muhl. Taller and more branched, minutely hoary-pubes- 

 cent, the stem terete and with only a trace of hairy lines, or none ; leaves 

 linear-lanceolate, tapering to a short but distinct petiole, somewhat acute; 

 capsule hoary, the pedicels as long as the leaves. 



E. strictum, Muhl. Densely pubescent, with soft and spreading, 

 somewhat glandular whitish hairs, l-3 high ; leaves broader, obtuse 

 and veiny, very short-petioled or sessile. 



*+ * Leaves not revolute, rather broad and thin, prominently toothed. 

 All in wet places N. 



E. coloratura. Muhl. More or less hoary and glandular-pubescent, 

 l-3 high, with angled stems ; leaves lanceolate, sharply denticulate and 

 acute, narrowed into a conspicuous petiole ; flowers pale and more or less 

 nodding, with pedicels shorter than the leaves ; seeds not prolonged at 

 top. Common. 



E. adenocaiilon, Haussk. More glandular, with blunter and less 

 toothed leaves which are abruptly contracted into very short petioles; 

 flowers erect, and seeds slightly prolonged at the top. 



E. glanduldsum, Lam. Nearly simple, and the pubescence above not 

 glandular ; leaves ovate-lanceolate, usually rounded into a sessile base, 

 more or less glandular-toothed. 



2. ZAUSCHNERIA. (Named for H. Zauschner, a Bohemian bota- 

 nist.) 11 



Z- Califdrnica, Presl. Cult, for ornament, from Gal., flowering through 

 late summer and autumn ; l-2 high ; the oval or lanceolate leaves and 



