47 



achenium, habit of the involucre after blossoming, and the comparative 

 lengths of the beak and the body of the achenium. It extends sparingly 

 throughout Japan, especially grows in field, and perishes early in summer. 



Laetuca (Ixeris) chelidonifolia Makino sp. nov. in sched. herb. Sc. 

 Coll. Imp. Univ. Tokyo, 1896. 



A glabrous mountainous annual, branching close to the base, 5-40 cm 

 high. Tap-root often obliquely descending, slender, tapering downwards, 



sometimes branched, with fine rootlets. Stem and branches slender, terete, 

 smooth, often flexuous, the branches more often spreading. Leaves sparse, 

 petioled, oblong or elliptical-oblong in outline, odd-pinnatisected, nearly glauc- 

 ous beneath, thin and herbaceous, 2-6 cm broad, 4-12 cm long including the 

 petiole ; divisions spreading, generally more or less subopposite, apart from 

 one another, 3-4 on each side of the rachis, obliquely ovate, inferior ones 

 smaller, scantly and coarsely lobato-dentate or sometimes lobate, mucronate- 

 acute, gradually or often rather abruptly narrowed towards the base so as 

 to form a petiolule but abruptly dilated at the base and decurrent-adnate 

 to the rachis, larger ones about 3 cm long, 1 J cm wide, teeth deltoid and 

 mucronate-acute, veins not conspicuous ; rachis slender, filiform ; petiole 

 slender, rather long, slightly dilated and bears small angular stipulaceous 

 leaflets at the base. Corymb small, terminating the stem and branches. 

 Head small, pedicellate. Involucre cylindrical-oblong, furnished with 3 

 minute blackish-green deltoid-ovate obtuse scaly bracts close to it below; 

 involucral-bracts 5, linear- strap-shaped, herbaceous, the inner ones much 

 broader and linear- oblong with hyaline margins, even-sided, obtuse and 

 villosulate at the apex, usually trinerved, about 5 mm. long in flower and 

 6 mm in fruit. Keceptacle minute; fiat. Flolets few and 4-5 in each 

 head, all ligulate. Corolla yellow, exceeds the pappus; ligule thin, 



broadly ligulate, 5-dentate at the end ; basal tubular part slender and 

 glabrous. Anther with a broad obtuse tongue at the tip and sagittate 

 at the base, about 1 J mm long. Ovary minute, obovate-oblong, glabrous ; 

 style filiform, minutely puberulent above, bifid with '2 slender recurved 

 arms. Pappus many, simple, white but often yellow at the base, finely 

 scabrous. Achenium dark-brown, cylindrical-fusiform, slightly compressed, 

 longitudinally 10-ribbed, not beaked but gradually narrowed above, hispid u- 

 lous-scabrous above, 4- scarcely 5 mm long. 



Nom. Jap. KusanoGba-no-hUcu (S. Okubo). 



Bab, Prov. Shimotsuke : Mt. Nikko (T. Makino ! Aug. 1S84 ; & 



