24 THE BOTANICAL MAGAZINE. LVoi. xxxvi. No. 422. 



L. alpicola, Nakai in Tokyo Bot. Mag. XXIV. Jap. p. 267 

 (1910). 



L. Thunbergii lusus alpicola, Takkda in Tokyo Bot. Mag. XXIV. 

 p. 71 (1910). 



Nora. Jap. Takane-nigana. 



Hab. in montibus Hondo. 

 Supplementum ad 525). 



Folia basi amplexicaulia petiolis supra sulcatis 1—3.5 cm. longis 

 plus minus purpurascens. Costa supra leviter impressa, infra elevata 

 purpurascens. Lamina lanceolata acuminata integerrima leviter und- 

 ulata. Inflorescentia axillaris corymboso-paniculata. Pedunculi cum 

 foliis parvis 2-4, basi dorsiventrali leviter compressi purpurascentes. 

 Bracteas et bracteolae minutae. Pedicelli minute 2-4 bracteolati. In- 

 volucri phylla 5, 7 mm longa dilute viridis apice purpurascens primo 

 quincuncialis. Flores in quoque involucro 5 (4). Corolla ligulata, 

 ligula alba dilutissime purpurascente apice 5-dentata, 4 mm. longa 3 

 mm. lata, tubo 3 mm. longo. Stamina exerta, antheris nigrescenti- 

 bus. Stigma exertum bifidum recurvum. 



Floret in mense Octobrio in domo calido nostri horti Botanici. 

 538 emend.) Mycelis sororia, (Miquee) Nakai comb. nov. 



Lactuca sororia, Miquel Prolusio p. 121. Franchet et Savatier 

 Enum. PI. Jap. I. p. 268. Maximowicz in Mel. Biol. IX. p. 358. 

 Matsumura Ind. PI. Jap. II. 2. p. 655. 



Ixeris sororia, Nakai in Tokyo Bot. Mag. XXXIV. p. 155. 

 (1920). 



Hab. in Japonia. 



The genera of Lactuca-aWies are- distinguishable by the shape of 

 achenes as follows. 

 Lactuca— Achenia compressa utrinque alata facie 1 v. 3 costata, ie 



venis achenii 4 quarum 2 oppositae in alis lateralibus et ceterae 



in costis 1—3 variantibus. 

 Ixeris— Achenia fere teretia aequaliter 10-alata ie venis achenii 4 quarum 



2 oppositae in alis 2, ceterae in alis 3 variantibus. 

 Mycelis— Achenia fere teretia 12 costata ie venis achenii 4 omnibus in 



costis 3 variantibus. 

 Paraixcris— Achenia fere teretia 14 costata ie venis achenii 4 quarum 



2 oppositae in costis 3, ceteras in 4 variantibus. Interdum venis 



reductis Myce//s-formam occupant, sed semper apice setuloso- 



pilosa. 

 607) Siphonanthus trichotomus, (Tiiunberg) Nakai comb. nov. 



