10 



Slum decumhens Thunb. Fl. Jap. (1784) p. 118 ; Willd. Sp. PI. 

 (1797) p. 1435 ; Pers. Syn. PI. I. (1805) p. 316 ; Schiilt. Syst. Veg. VI. 

 p. 544; Spreng. Syst. Veg. I. (1825) p. 906; DC. Prodr. IV. p. 126. 



Chamcele tenera Miq. Ann. Mus. Bot. Lugd.-Bat. III. (1867) p. 60, 

 et Prol. Fl. Jap. p. 247; Franch. et Sav. Enum. PI. Jap. I. p. 184, et 

 II. p. 374. 



^gopodium tenerum Yabe Rev. Umbel. Jap. p. 46. 



Nom. Jap. Sento-so. 



Hah. Japan, common. 



Alsine arctica (Stev.) Fenzl " Verbreit. d. Alsin. p. 18," et in 

 Ledeb. Fl. Ross. I. p. 355 ; Regel PI. Radd. I. pp. 338, 346, excl. var. /9. 



Arenaria arctica Stev. in litt. ex DC. Prodr. I. (1824) p. 404 ; 

 Cham, et Schlecht. in Linnsea I. p. .54 ; Spreng. Syst. Veg. II. p. 399 ; 

 Hook. Fl. Bor. Amer. I. p. 100, tab. 34, excl. var. x- ', Torr. et Gray Fl. 

 N. Amer. I. p. 181, excl. var. y. ; Robins, in A. Gray Syn. Fl. N. Amer. 

 I. 1, p. 247. 



Arenaria sajanensis Willd. herb, ex Spreng. 1. c. 



Arenaria vertia var. horealis herb. Sc. Coll. Imp. Univ. Tokyo, et 

 Cat. Herb. Coll. Sc. Imp. Univ. Tokyo, (1886) p. 23, non Fenzl. 



Leaves linear-subulate, obtuse, 1 or obsoletely 3-nerved, subcarnose. 

 Peduncles 1- rarely 2- flowered. Flower 8-12 mm. across. Sepals very 

 obtuse. Petals usually scarcely twice the length of sepals. Stamens 

 shorter than the petals. Ovary ovoid-oblong. 



Nom. Jap. Tahane-tsumehusa (nov.) 



Hab. Prov. Shinano : Mt. Komagadake {R. Yatahe ! herb. Sc. Coll. 

 Imp. Univ. Tokyo, Aug. 2, 1880 ; K. Yazaiva ! Aug. 1893 ; K. Watanahe ! 

 Aug. 1-3, 1894 ; S. Hara ! Aug. 31, 1902 ; K. Tanaka ! Sept. 25, 1902), 

 Mt. Shirouma {M. Orii ! Aug. 29, 1902) ; Prov. Etchu : Mt. Tateyama 

 (jR. Yatahe and J. Matsumura ! herb. ibid. July 24, 1884) ; Prov. Kitami : 

 Isl. Riishiri {T. Kaivakami ! herb. ibid. Aug. 1899). 



Not uncommon on alpine mountains in middle and northern Japan. 

 New to the Flora of Japan. 



Alsine verna (Linn.) Bartl. var. borealis Fenzl in Ledeb. Fl. Ross. 

 I. p. 349 ; Maxim, in Mel. Biol. IX. p. 23 ; Franch. et Sav. Enum. PI. 

 Jap. II. p. 298. 



