ONAGllACEAJi (KYiiNlNG PlilMliOSE FAMILY) 335 



serted; ovary: and capsule i minutely glaidular-pubescent. — Utah, and prob- 

 ably m northwestern Coloi'ado; '.'I 



4. EPILOBIUM L. Willow Herb i 



Herbs Or sometimes shrubby plants,' yith alternate or opposite leaves, and 

 axillary or terminal, solitary or racemose flowers. Calyx lineai", produced be- 

 yond the ovary, the limb 4-parted, deciduous. Petals 4, mostly obovatje or" 

 obcordate. Stamens 8; anthers oblong ot linear, short. Ova,iy, 4-celled; 

 united styles slender or filiform; stigma club-shaped Qr,4-lobed. Ca,psule 

 elongated, 4-sided, 4-pellpd, looulicidally dehiscent by .4 valves. Seeds small, 

 nuinerous, with a tuft of hairs (coma) at the summit. 



Annual . . . . > . . . . . , . 1. E. paniculatum. 



Perennials. 

 Stignja deeply 4-lobed or 4-cIeft: ,floWers cream-colored . , 2. E. Buffruticosum. 

 Stigmii entire or only notched: flowers never yello'w. 



Seeds smooth or nearly so under the microscope. ' 



1. .Leave? mediiun size, more^or less toothe^. I 



Flowers violet . . . . . . . 3. E. Hornemannii, 



' • ' Flowets white , ' . . . . . . .4. E. alpinum. 



' Leavies small, entire or nearly so; plants 3-10 cm. high . 5. E^ anagallidifolium. 

 , ; iSeedg papiUaterrpughened imder the microscope. i : 



Flant^ not glandular; leayes linear. .- . 1 . . 



Foliage and lower part^of the stem glabrous , . . 6. ' E. wyomingense. 

 Foliage -and stem crisped-^hairy , • . . . - . 7. E. lineai^e^ -. 

 .. ,,, , Plants. glandular above at least. " l' •■■'■'■ '■, 



Plants usually less than 3. dm, high. , . 

 " Leaves numerous and approximate;' plants low, less 



than 2 dm.. high; - , i ,ii!. i . . u ii . 



. Plants, erect, not ca^pitoser i,r..; ,; . . . - 8. E. saximontanum. 



Plants assurgent; densely c'aespitpse . , . 9. IJ, clavatum. 

 Leaves fewer, remote', siiberect; plai]^s'2-3 dm. nigh, 

 -< . i^j;. with turions (if any) not'sessile. ' ■ ..... 



.,,;,{«, , .Leaves narrow,, somewhat petioled,; . , .10. E. Drummondii. . 

 Lea-ves oblong to '"ovate, sessile . . ... 11. E. ovatifolium. . 



Plantstall, 4-10 dm. high. " , 



1'. il . lOsually freely branched, leafy, very glandular; ■'{ 



, petioles snort, winded . . ...'.. .12. E, adenocaulon.i' )i - 



Usually subsimple, less leafy and less glandular; i . 



petiole slender ; , . . . . . 13.' E. perplexanS, 

 : • . i r . , 1 1 . o 1 . ; ■ ',"-_■'-' 



1. Epilobium paniculatum Nutt. T. & G. Fl. 1: 490. 1840i • Annual, 

 slender, 3-6 dm. tall, loosely branched, glandular-pubescent above: leaves 

 alternate, linear to linear-lanceola);e,,.2.5-7.5 cm. long, denticulate or nearly 

 entire, attenuate into slender-winged; petioles: calyx .often purple, tits tube 

 funnelfprm, 2-3 mm. long, shorter than the lanceolate segments: petals, cune- 

 ate, notched, 6-8 mm, long, violet;, capsules ascendina'llinear-fusiform, 2-3:. 

 cm, Ipng, curved: seeds obovoid, 2 mm. long, black, slightly papillose.— Ap-^ 

 parently in most parts of the western United StaiteSi . , n- 



2. Epilobium suffruticosum Nutt. 1. c. 488. Stems woody and 'freely 

 branched at ba^e, 10-16 cm. high, minutely canescent throughout or at length 

 glabrate belqw: leaves numerous, less than 2 cm. long, mainly oppositci broadly 

 lanceolate, acutish, entire, narrowed below but hardly petioled, thick^ with 

 inqonspiouous veins: flowers rather few, in, the axils, of the scarcely, reduced 

 upper leaves: calyx-tube broadly funnelform: petals 6-8 mm. long: capsule ; 

 20-25 ,mm. long, short-stalked: seeds 1 mm. or more lorlg, coma long and 

 very dingy. — ^'Western 'Wyoming to Montana and Oregon. 



3. EpUobium Hornemannii Reichenb. , Icon. Crit. 2.:. 73. 1824. Mostly* 

 2-3 dm. high, ascending, unbrai^ched, somewhat crisp-hairy in the inflores- 

 cence, or slightly glandulariat top, otherwise.glabrate: leaves about 25 mm^ 

 long, subascending, elliptical-ovate, mostly very obtuse, nearly entire to tct ; 

 motely serrulate, the lower cuneately .narrowe(ij)ihe upper u&ually abruptly 

 roiinded to the (short petioles: flowers rather few, nearly erect: petals 5-8 mm. 

 long, lilac to deep violet: capsules as much as 5 cm. long, slender, erect, on 

 slender peduncles about equaling the .gradually reduced subtending leaves: 

 seeds rather abruptly short-appendaged, from nearly smooth to very rough.Tr 

 Ihroughout our range to California and British Columbia. 



