A SYNOPSIS OF THE SPECIES OF ISOETES. 109 



38. I. japonica, A. Br. in Verhand. Brand., 1862, 33. — Eootstock 

 3-lobed. Habit between eckinospora and setacea. Leaves 12-30, 

 4-6 in. long, ^-£ lin. diam. at the middle, bright green, diaphanous, 

 tapering to the point, furnished with stomata and accessory bast- 

 bundles, the edge decurrent from the dilated base short and 

 narrow. Sporange small, oblong ; veil none. Microspores 

 deeply and regular honeycombed. Microspores smooth, sometimes 

 crested. 



Hab. Japan, discovered by Schottmuller in 1860; regathered 

 lately by Moseley and Dickens. 



39. I. coromandelina, Linn. SuppL, 447. — Eootstock 3-lobed. 

 Habit stouter than in setacea and velata. Leaves 10-20, 9-15 in. 

 long, £-£ lin. diam. at the middle, opaque, moderately firm in 

 texture, tapering to the point, furnished with copious stomata and 

 accessory bast-bundles, the membranous base suddenly dilated. 

 Sporange large, pale, oblong; veil none; tongue linear, as long 

 as the sporange. Macrospores chalk-white, with strong ridges and 

 prominent close tubercles. 



Hab. Moist soil near Madras, Wriyht, 309 ! Discovered by 

 Kcenig. 



40. I. brachyglossa, A. Br. in Verhand. Branden., 1862, 32. — 

 L capsulars, Griff. Ic, t. 116-118, non Eoxb. — Eootstock 3-lobed. 

 Habit exactly of I. coromandelina. Leaves 20-30, about a foot 

 iong, i~* lin 



Cf 



the point, furnished with abundant stomata and accessory bast- 

 bundles, the membranous base suddenly dilated. Sporange large, 

 pale ; veil none ; tongue cordate-ovate cuspidate, broader than 

 long. Macrospores middle sized, chalk- white, closely strongly 

 tubercled. 



Hab. Serampore, Griffith ! Boxburgh's I. caput lam, as shown 

 by his drawings, is a male plant of YaUisneria spiralis. Our 

 specimens of this and coromandelina are all without micro- 

 spores. 



41. I. tripus, A. Br. in Berl. Monatber., 1863, 559; 1868, 544. 

 —I. phaospora, Durieu in Bull. Bot. Soc. France (1864), 103. 

 Eootstock 3-lobed. Leaves 10-20, very slender, 1-1| in. Ion 

 i-i lin. diam., opaque, pale green, firm in texture, furnished with 

 stomata and accessory bast-bundles. Sporange small, pale, 

 globose ; veil none. Macrospores small, greyish white, covered 

 with dense minute tubercles. Microspores smooth or nearly so. 



Hab. Swan Eiver, West Australia, Vrummond, 990 ! 



42. I. amazonica, A. Br. MSS.— Eootstock 3-lobed. Leaves 

 10-20, 2-3 in. long, J-^ lin. diam. at the middle, firm in texture, 

 furnished with stomata and accessory bast bundles, with a 

 juembranous border about i in. long decurrent from the dilated 

 base. Sporange small, white, globose, much spotted; veil 

 rudimentary. Macrospores middle-sized, chalk-white, closely 

 strongly tubercled. 



Hab. Inundated places near Santarem, Spruce, 1081 ! 



