44 



calycles, aud the colour of the anthers serve as the points of distinction 

 between them. Pedicels are always erect in flower and fruit, neither sprea- 

 ding nor cerauous. 1 have named after Prof. Saburo Okubo, who has 

 first noticed on the peculiarities of this species. 



Lactuca (Ixeris) versicolor Schultz-Bip. var. arenicola Makino. 



Perennial herb, 15-46 cm high. Tap-root slender, often somewhat 

 fleshy. Stems more often branched at the base. Leaves usually dense- 

 tufted near the ground, ascending, narrowly linear, 6-18 cm long, 3-18 mm 

 broad, usually entire or sometimes minutely and remotely dentate along 

 the lower margins, acute at the apex, narrowly and gradually attenuate 

 below and dilated and stem-clasping at the base, slightly thick in texture, 

 scarcely glaucous, glabrous. Flowering-stem erect, slender, usually with a 

 few leaves. Inflorescence loosely corymbose ; pedicel filiform, much longer 

 than the head. Corolla yellow, but in form and size flowers and fruits 

 are like those of the white -flowered form. 



Lactuca tamagawaensis Makino Notes on Jap. PI. XV. in Bot. Mag., 

 Tokyo, 1892, p. 56. 



Nom. Jap. Kawara-nigana. 



Hab Prov. Shimotsuke : Nikko (Herb. ! Sc. ColL Imp. Univ. Tokyo, 

 July 28, 1877, and June 19, 1878); Prov. Musashi: Chichibu (I.e.! May 

 1878), Pviver Tama-gawa (1. c. ! Aug. 9, 1880 ; T. Makino ! June 17, 1888, 

 and May 27, 1894), lida-mura in Chichibu (T. Makino ! July 15, 1888). 



Flowers of L. versicolor Schultz-Bip. are in Japan generally white or 

 white tinged with light violaceous colour, while this variety singularly bears 

 the yellow-flowers, and is always found grown in dry gravelly beds of rivers, 

 as in River Tama-gawa in the province of Musashi. The white flowered ones 

 in Japan have the leaves less dense, broader, thinner, and usually sharply 

 and grossly dentate, are common all over the country and grown always in 

 grassy places. 



{To be continued.) 



