160 ERYTHEA. 



■M- Petals elongate-cuneate, acutely trifid, the subequal lobes one-third the 



length of the petals, these twice as long as the calyx-lobes 



1 . trifida Graham 



++ ++ Petals oblanceolate, entire or slightly cleft into short unequal lobes, 

 little exceeding the calyx-lobes 2. violacea Eydberg 



-)- -I- Calyx-lobes 3-nerved, the midnerve simple, the lateral ones branched 

 on the outer side or rarely simple ; plants larger, the inflorescence 

 6-12 cm. long. 



++ Calyx-lobes obtuse, not mucronate ; petals entire or parted into filiform 

 lobes ; leaves reniform-orbicular, not angularly lobed. 



= Petals deeply 3-parted into filiform lobes; flowers 4 mm. long 



3. stauropetala n. sp. 



= = Petals filiform, 1-nerved and entire, or sometimes parted near the 

 apex into two orthree lobes; flowers 2 mm, long. ..4. stenopetala n. sp. 



= := = Petals oblanceolate, acuminate, 3-nerved in the widest part, entire; 

 flowers 1.5 mm. long 5. micrantha n. sp. 



++ ++ Calyx-lobes acute, mucronate; petals palmately cleft at apex; leaves 

 angularly lobed 6. diversiloba Greene 



* * Flowers apetalous; petaloid staminodia sometimes replacing the 

 stamens 7. anoynala n. sp. 



MiTELLA TRIFIDA Graham, Edinb. New Phil. Journ. 185, June, 

 1829. The type of this species was raised in the Edinburgh 

 Botanic Garden from seed collected by Druramond in " Alpine 

 rivulets, north of Smoky River, on the east side of the Rocky 

 Mts., rare." Graham's description is given in considerable detail, 

 and the following recent collections answer to it perfectly excepting 

 that the calyx-lobes are not reddish, viz. : Washington, Goat 

 Mts., Allen, No. 195, July 2, 1895; Mt. Rainier, Allen, No. 7, July 

 20, 1892; Olympic Mts., Flett, No. 83; Mt. Baker, Flett, No. 

 858; and a doubtful fruiting specimen. West Klickitat Co., 

 Suksdorf, No. 122. 



Mitella violacea Rydberg, Bull. Torr. Bot. Club, xxiv, 248. 

 In this species the venation of the calyx-lobes corresponds to that 

 of M. trifida, the midnerve being branched, the lateral ones simple. 

 The violet coloration of the calyx-lobes and petals is not a constant 

 character even in the type specimens. Exactly the same thing 

 occurs also in M. stauropetala. 



