570 CLXX. NAiADACE^. (J. D. Hookei.) [NaicLs- 



INDETEBMINABIiE SPECIES. 



N. TENUIS, A. Br. (not Z. tenuis, Rent. Cat. Jard. Gener., 1854) is a plant 

 from Behar alluded to by Magnns in his " Beitrag. Gatt. Naias," Vonoort, p. vii., 

 and refers probably to a form of N. minor as above diagnosed. 



N. HBTEBOMOEPHA, Griff, ex Voigt Sort. Suburb. CalcuU. 694. A Serampore 

 specimen so named in Herb. Eew, by Griffith, has a very long laxly leafy stem, the 

 long toothed leaves have no auricles, or most minute toothed ones. It is not in 

 flower or fruit. 



N, BisiDA, Griff. Notul. iii. 181. I cannot identify any Indian species with 

 this. It is a native of Serampore, described as blackish green when dry with fleshy 

 rigid leaves. Some specimens included under N. minor answer to the colour. 



7. CVmODOCEA, Kcemg. 



Submerged marine plants ; rootstock rigid, jointed, creeping. Leaves 

 oblong or Enear ; sheaths stipnlar. Flowers axillary, nni- or bi-sexnal, 

 in membranous sheaths. Perianth 0. Male yl. Anthers 2, elongate, 

 connate, stipitate, slits extrorse ; pollen confervoid. Fl. fem. Carpels 2, 

 STibsessile, ovoid, compressed, l-ovuled ; style short, stigmas subulate 

 recurved ; ovule pendulous, orthotropons. Fruit of 2 ovoid coriaceous or 

 woody and externally succulent carpels. Seed pendulous ; testa thick ; 

 embryo inflexed. — Species 4 or 5, Indian and Pacific Oceans. 



As this sheet was passing through the press, I received from Ur. Trimen a list of 

 the Ceylon Halophytes known to him, and in which I find Oymodocea serrulata (true) 

 and 0. australis. And amongst the St/drocharidece, there are to be added at p. 663 

 of vol. v., SalopMla Beccarii, Aach., and TAalassia Memprichii, Asch. 



1. C. ciliata, Ehrenb. ex Aschers. in Sitzh. Ges. Naturf. Fr. Berl. 

 (1867) 3 ; in Linnsea xxxv. 162 ; leaves 3-6 by ^-| in. linear falcate, tip 

 rounded ciliate-serrulate. Boiss. Fl. Orient, v. 23 ; Benth. Fl. Austral, vii. 

 178; Aschers. in Bitzb. Bot. Ver. Brandh. (1882) 28. Thalassia ciliata, 

 Ron. Ann. Bot. ii. 97 ; Kunth JEnum. iii. 120. Posidoaia serrulata, Thw. 

 Fnum. 333. Zostera ciliata, Forsh. Fl. ^gypt. Arab. 157. 



Andaman Isids., Frain. Ceylon, Gardner, Barvey. — Distb. of the genus. 

 Stem or rhizome 3-12 in., woody, branched, covered with annular scars. Fl. and 

 frt, unknown. 



2. C- serrulata, Aschers. Sf Magn. in Sitzb. Oes. Naturf. Fr. Berl. 

 (1867) 3 ; leaves 4r-6 by ^-| in. linear nearly straight, tip entire or denti- 

 culate. Posidonia serrulata, Spreng. Syst. i. 181. 



Cetion, Thwaites (C.P. 3056).— Distbib. of the genus. 

 I have seen no Ceylon flowering or fruiting specimens. 



3. C. Isoetlfolia, Aschers. I. c. ; in Linnsea, I. c. 163 ; amd in Nuov. 

 Giorn. Bot. ii. 182 ; stem short, leaves terete fleshy grooved tip 3-toothed. 

 Boiss. Fl. Orient, v. 22; Benth. Fl. Austral, vii. 178. C. sequorea, Kunth 

 Enum. iii. 118 (jexcl. 8yn.) ; Thw. Fnum. 333. 



South Caknatic ; at Tutieoreen, Wight. Ceymn, Barvey, Glenie. —BisiniB. 

 Indian Ocean. 



Leanes 3-5 by -jV-to i"-) glaucous. Flowers, in dichotomous cymes. 



4. C. australis, Trim. Oat. Ceylon PI. 99; leaves 5-7 by i-i in. 

 linear nearly straight tip rounded or truncate and 3-toothed. Halodule 

 austrahs, Miq. Fl. Ind. Bat. iii. 227. Diplanthera tridentata, Steinh. in 

 Ann. So. Nat. 8er.n.i-x. 98. Zostera uninervis, Forsh Fl. ^gvpt Arab 



cxx. and 157. 



