118 



more flaccid in submersed ones ; midrib straight ; veins 2-4 or sometimes 5 

 on each side, delicate, loose, erect-patent, a little curved, simple or loosely 

 branched, free or very loosely anastomosing, each end excurrent to the 

 margin where they become thick presenting a macula ; stipules geminate, 

 minute, about equal to the petiole in length, sessile, erect, triangular-ovate, 

 acute, minutely inciso-serrate, thinly membranaceous, h} T aline, nerveless. 

 Flower minute, about 1J mm across, solitary, axillary, alternately or rarely 

 oppositely placed, very shortly pedicellate ; pedicel J-1J mm long, narrow, 

 erect-patent. Calyx 4-sepaled, subpersistent ; sepals equal or one of them 

 smaller than the rest, shorter than the petal, connate at the base with 

 the broad and obtuse sinuses between them, ovate or ovate-oblong, rounded- 

 obtuse at the apex, entire or often with a few teeth on the lower margin, 

 thinly membranaceous, viridescent but hyaline towards the margin, her- 

 baceous, flaccid, about j mm long, indistinctly one-nerved. Corolla 3- 

 petaled ; petal elliptical, concave within, very thinly and delicately mem- 

 branaceous, hyaline, rubescent in terrestrial ones, rounded-obtuse, entire, 

 one-nerved, about l«w or slightly more long. Stamens 3, alternate to the 

 petals and somewhat shorter than them ; filament subulate ; anther minute, 

 2-celled, rounded. Ovary globose, sessile, 3-locular, longitudinally 3-furrow- 

 ed, smooth, glabrous, thinly walled ; ovules minute, numerous, ascending, 

 arcuato-oblong ; styles 3, free, short, erect, persistent, with the terminal 

 capitate stigma. Capsule more or less depressed globose, 3-carpellary, about 

 11 mm in diameter, shallowly 3-furrowed, with 3 short persistent styles on 

 the slightly concave top, septicidal ; valve thin, concave within, leaving the 

 three septa and a short central placentiferous axis when dehiscing. Seeds 

 numerous, about 26-48 in number, minute, J mm long, oblong-cylindrical, 

 a little arcuate, rounded-obtuse on both ends ; testa more or less crusta- 

 ceous, sub-fragile, clathrate-rugose with fine numerous and transversely hex- 

 agonal areolfe arranged in 8-11 vertical rows, light amber-coloured : embryo 

 cylindrical, rounded on both ends, exalbuminous ; cotyledons shorter than 

 the caulicle. 



Elatine triandra Franch. et Sav. Enum. pi. Jap. I. p. 54, non 

 Schkuhr. 



Xom. Jap. Mho-holzobe (Y. Tanaka). 



Hab. Prov. Tosa : Kusaka (T. Makino ! 1885), Uyama near Naka- 

 mura (T. Makino ! Oct. 23, 1885), Godaisan-mura (T. Mahino ! June 

 1893); Prov. Musashi : Noborito (T. Makmol July 11, 1888), Shimura 

 (T. MaUno\ 1888), Omiya in Nakasendo (T. Mahino ! Sept, 1888), 

 Koiwa-mura (T. Maldno ! Aug, 1893) ; Prov. SwnroosA : Mama (T 7 . 



