52 Systematik und Pflanzengeographie. 



Die Eintheilung ist folgende : 



A. Stigma duply 41obed or 4cleft. 



1. Seeds not prominently papillate, mostly smootb. 



Flowers purple or pale never yellow. 

 Flowers very large, opening nearly flat. 



Seeds long and narrow with persistent coma; pubescencenot glandulär 

 Leaves with very evident looped veins ; bracts small ; style pubes- 

 cent at base. E. spicatum. 



Veins inconspicuous, rarely looped ; bracts leafy ; style glabrous. 



E. latifolium. 

 Seeds broad ; ovary soft glandulär : bracts reduced. E. rigidum. 



Flowers smaller, less open; seeds short and broad with easily falling 

 coma. E. paniculatum. 



Flowers bright yellow, lar^e but not opening widely ; leaves broad, 

 toothed, glabrous. E. luteum. 



2. Seeds papillately roughened under the microscope. 



Flowers cream. colored, smaller; leaves narrow, entire, canescent. 



E. suffruticosum. 

 Flowers purple or pale, never yellow. 



Hirsute or tomentose with long spereading white hairs. E. hirsutum. 

 Glabrous, canescent or short glandulär. 



Flowers very large and open; plants rather low, perennial, nearly 

 sipple above ; leaves broad. 



Leaves acute at both ends, entire. E. rigidum. 



Leaves rounded at base, repand-toothed. E. obcordatum. 



Flovers less open ; plants tall , dichotomous or panicled , leaves 



oblongated. E. panicxdatum and var. jucundum* 



E. excätatum (cfr. adenocaulon) , E. Orcyanum (cfr. glaberrimum) and another 



supposed hybrid, which is mentionned under Hornemanni would be looked for 



under A., because of their stigmatic characters. 



B. Stigma entire or only notched ; flowers near yellow. 

 1. Seeds not prominently papillate mostly smooth. 



Seeds broadly obovoid, very blunt; coma easily falling; leaves sub- 

 petioled, narrow, acute. 



Glabrous or glandulär, dichotomous; leaves mostly veined, often 

 ircurved or folded along the midrib ; seeds very large. 



E. paniculatum. 

 Cripp pubescent, simple or panicled ; leaves mostly veinless, seeds 

 half as large. E. minutum. 



Seeds fusiform ; coma more persistent. 



Leaves mintely revolute, . . . smoother seeded forms of the group of 



E. palustre^ 

 Leaves not revolute, stein simple or few branched below. 



Leaves rather ample, ovate to elliptical, some of them usually 

 toothed (E. glandidosum with seed papillae collapsed, might be 

 sought here). 



Glandular-pubescent, leaves sessile, some of them broadly decur- 

 rent, seeds very long, blunt at base, tupering above into 

 abroad pale apex. E. Halleanum. 



Crisp-pubescent in lines, leaves not decurrent, seeds shorter, more 

 acute below, with narrower sometimes very short and 

 abrupts beak. 

 AI uskan species with very flowers. 



Erect, leaves elliptical, tapering to each and, petiolated, flowers 

 nodding. B. Bongardi. 



Ascending at base, leaves ovate, the upper sessile, flowers 

 erect. E. Behringianum. 



Extending southward in the mountäins, stems ascending at base, 

 leaves petiolated. 



Flovers violet, medium sized, leaves dark green or purpre, seeds 

 blunt above . . . 



exceptionally smooth, seeded plants of E. Hornemanni. 



