166 



sometimes geminate, about 18 mm. across, odoriferous ; the pedicel about 

 4-18 mm. long, narrow, with laxly placed caducous subulate ciliated scale- 

 bracts. Calyx about 8 mm. across, patent, green, persistent, 5-cleft ; lobes 

 depressed-deltoid, or deltoid, somewhat unequal in size and some of them 

 subulato- deltoid or more or less linear-foliaceous above, a little produced 

 and obtuse, thick, glabrous, more or less concave within, minutely ciliated. 

 Corolla erect-patent, pure white, deciduous ; petals 5, narrowly oblong- 

 spathulate, obtuse, entire, thickish, sparsely punctate externally, about 

 14-15 mm. long, 5J-7mm. broad. Stamens erect, shorter than the 

 corolla, 16-21-antheriferous ; filaments united into 5 bundles or sometimes 

 sub-tubular with short and free tips, 1 to 5-antheriferous to a bundle, the 

 bundle rectangular-spathulate, but linear-filiform in that of one-antherifer- 

 ous one ; anther elliptical or oblong-elliptical, introrse, shortly apiculate at 

 top, bifid at base, yellow. Disk annular, entire, glabrous. Ovary somewhat 

 depressed-globose, truncate at top, glabrous, thick-carpeled, 9-11-celled, 

 many-ovuled, about 3J mm. across ; style erect, lower than stamens, thick, 

 cylindrical ; stigma globose ; ovules minute, horizontal, in 2 rows. Fruit 

 globose, somewhat depressed, 4J-8 cm. across, yellow, often scarcely raam- 

 millated at top and concave in its centre, depressed at base, aromatic, the 

 surface more or less uneven, the oil-glands sparse and slightly concave; the 

 rind thick, white and spongy interiorly, closed to cells, 9-11-celled, with 

 thin dissepiments ; cells packed with a soft tissue of indistinct fusiform and 

 yellowish vesicles, filled with an acid juice, the axis white and spongy ; 

 pedicel terete. Seeds usually many, oblong-obovoid, often a little com- 

 pressed, smooth, pale-yellowish, about 13-17 mm. long, the rhaphe more or 

 less distinct ; testa firm ; tegmen membranaceous, slightly thicker and rose- 

 coloured internally at the chalaza ; embryos 1 to 4 to a seed, cotyledons 

 white. 



Citrus Medica b. Junos Sieb. Synops. PI. Oeconom. Jap. in Verh. 

 Bat, Gen. XII. 1830, p. 59. 



Citrus Junos Sieb. herb, ex Miquel. 



Citrus Bigaradia forma Miq. Prol. Fl. Jap. p. 15. 



Citrus Aurantium Thunb. Fl. Jap. p. 293, ex parte, non Linn. 



Citrus sp. (Yii7Ai) Makino, 1894. 



Citrus Aurantium var. Bergamla forma (Yuzu) Makino, 1895. 



Citrus Medica var. Yuzu Matsum. Shokubutsu-Mei-i, 1895, n. 898, 

 in emend. 



Juu, vulgo Aje Tats banna Keempf. Amoen. Exot. p. 801, 



