564 CLXX. NAIADAOEE. (J. D. Hooker.) 
2. APONOGETON, Thumb. 
Submerged scapigerous plants ; rootstocks tuberous. Eu e» im 
erect, oblong. Scape long, bearing a single or twin sessile pices closed 
unilateral or distichous bisexual flowers; the very young spikes e ual 
in a conical deciduous sheath. Perianth 0, or of 1-3 equal or ne 
white segments. Stamens 6 or more, filaments subulate, unequa pe ma 
tent ; anthers didymous. Carpels 3-6, 2- or more- ovuled ; styles P de d or 
discoid or decurrent persistent ; ovules basilar, anatropous. d urt 9 about 
more coriaceous follicles. Seeds erect; embryo straight.— Specie 
20, Asiatic, African and Australian. 
1. A, monostachyon, Linn. f. Suppl. 214; leaves floating oblong 
3-5-nerved opaque, cross nervules distinct, spike solitary, veh FL. Ind. 
than the 3 smooth 4-8-seeded follicles. Roæb. Cor. Pl. i. 58, t. Notul. iii 
i. 210; Thw. Enum. 323; Dalz. & Gibs. Bomb. Fl. 248; Grif- ‘A. mono: 
203; Wall. Cat. 5167, A, B, C, E.; Andr. Bot. Rep. vi. t. E À "ucens, 
stachys, Edgew. in Hook. Lond. Journ. Bot. iii. (1844), 405, t. hy ` Eder, 
Herb. Madr. A. flavidum, Herb. Ham. Spathium monostac yum, dicus, 
in Cale. Journ. Nat. Hist. iii, (1843), 533, t.16. Potamogeton loa” 
Roth ex Roem. $ Sch. Syst. iii. 576. Saururus natans, Linn. Mant. 
Rheede Hort. Mal. ii. t. 15. 
sia and 
Tanks, &c, throughout Ixpra and Cexrow.—bDisrRIs. Trop. Ast 
Australia, cordate. 
Leaves 3-6 in., acute or obtuse, herbaceous, base cuneate rounded or Seeds 
Spike 1-6 in., lax or dense-fld. Sepals obovate to lanceolate. eng distinct cross 
oblong.—Submerged leaves membranous transparent and wi 
nervules as in A. crispum. 
om 
2. A. crispum, Thunb. Nov. Gen. i. 73; leaves submerge’ a 
linear-oblong to lanceolate 3-7-nerved membranous trane "34 smoot 
nervules distinct, spike solitary, sepals much longer than t 1 Fl. Ind. ii. 
1-2-seeded follicles. Thw. Enum. 333. A. undulatum, Row). p Pl. 145. 
211; Wall. Cat. 5167, D. 5168; 5175, F.; Aitchis. Cat. Fed 84d) 405, 
Ouvirandra undulata, Edgew. in Hook. Lond. Journ. Bot. m. We (1843), 
t. 18. Spathium undulatum, Edgew. in Calc. Journ. Nat. Hist. wn. 
933, t. 15.—Limogeton, Edgew. ex Griff. Notul. iii. 203. 
Tanks throughout INDIA and Cryton.—Distrre, Australia. Sepals very 
Leaves 1-3 ft., flat or undulate ; base acute rounded or cordate. Roxburgh 
variable in size, if two species be not confounded under this name. i 
: fully Am: 
describes them **as in monostachyon," but in some specimens they are y 
long. 
e lineat- 
3. A. echinatum, Roxb. Fl. Ind. ii. 210; leaves e sepals 
oblong 3-5-nerved opaque cross-nervules obsolete, spike solitary: 
shorter than the 3 echinate 2-seeded follicles. 
Tanks in BENGAL, Rozburgh. 
: , Wight, 
I have zeen but one specimen of what I take to be this plant, in p in the 
named A. dispermum. Wight says it quite resembles 4. monostachyon; t beak, and 
follicles, which are larger, 2-seeded, more narrowed into a nearly Vn as about 
they are dorsally irregularly ridged. Roxburgh describes t the enlarge? 
6-seeded ; but he figures on the plate of A. monostachyon, apart a echinate and 
6-seeded follicles of that plant,3 others carpels which are strong d the forme: 
2-seeded, and to which he doubtless alludes under his description o 
