,504.] OBSERVATIONS ON THE FLORA OF JAPAN. 75 



remainder of the style, depressed-rounded at the top, dehiscent from the 

 base, 1- sometimes 2-seeded ; carpel coriaceous, thickish. Seed ellipsoid- 

 globose (in the solitary state), rounded and with a subcuspidato-acute point 

 at the top, marked with longitudinally 3-angulate lines and 3-subsulcate 

 lines, glabrous, castaneous, albuminous, about 8 mm. long ; hilum oblique, 

 broad ; testa crustaceous ; embryo erect, slightly shorter than albumen, 

 cotyledons ovate or oval-ovate, flat, caulicle nearly as long as the cotyledon. 

 Flowers in June. 



Bab. Prov. Shimotsuke : Nikko (T. Malcino\ June 1901, flower, Sept. 

 1901, fruit), Mt. Koshin (T. Makinol Sept. 11-12, 1901); Prov. Shinano : 

 Kiso (Suekichi Goto !). 



This species is allied to Htijrax Obassia Sieb. et Zucc, having 

 a very different appearence. 



Draba (^Leucodraba) shiroumana Makino in herb. Aug. 1903. 



About 4-9 cm. high (attening about 18 cm. high in cultivation) in 

 fruit. Perennial, densely aospitose ; caudex many-branched, branches erect 

 or ascending, foliiferous at the top. Rosulate leaves spreading or erect- 

 patent, spathulato-linear, gradually narrowed into a petiole below, acute, 

 entire or pauci-serrate, glabrous on both surfaces, but ciliated on margin 

 with spreading or erect-patent pilose hairs, thickish, green, concolorous, 

 6-13 mm. long, 1-1-2 mm. broad (longer and broader under cultivation), 

 nerves inconspicuous ; cauline leaves usually 1-3 or sometimes 4, remotely 

 alternate, erect-patent, sessile, semiamplexicaul, oblong-linear or subulato- 

 linear, acute or subobtuse, entire or pauci-serrate, laxly ciliated on margin, 

 5-12 mm. long, 1^-2 mm. broad (often longer and broader under cultiva- 

 tion). Stems subnumerous, erect, gracile, glabrous, usually simple, rarely 

 pauci-ramose. Ilaceme erect, 2 to several- (often numerous under cultiva- 

 tion) flowered ; rachis gracile, glabrous ; pedicels erect-patent, glabrous, 

 gracile, shorter than the flower. Flower small, 3-3J mm. in diameter, 

 white. Sepals erect-patent, elliptical, obtuse, concave, glabrous, delicately 

 sub-trinerved, light green, 2-2-1 mm . ] ng. Petals half-patent, longer than 

 sepals, cuneato-obovate, emarginate, shortly unguiculate, 3| mm. long. 

 Stemens as long as sepals ; filament filiform, glabrous ; anther minute, 

 ovato-elliptical. Ovary oblong, viridescent, glabrous ; style very short, with 

 a truncato-subcapitate stigma. Silicle erect-patent, lato-linear to oblong- 

 linear, attenuated towards both ends, straight or subfalcate, often slightly 



