378 LXXTIII. GENTIANEiE. [Filhmk 



"W, Australia. Swan Eiver, Druwmond, \st ColL SuppL n. (4 in Herb. F. Mucll.), 

 Trehsy n, 1958, Old field ; Blackwood liver, Oldjield. 



6. LIMNANTHEMITM, Gmel. 



Calyx 5-cleft nearly to the base. Corolla almost rotate, the tube short 

 aiul broad; lobes 5, with broad entire or fringed margins luduplicate in the 

 bud. Ovary surrounded by 5 minute hypogynous glands, 1-celled with ^ 

 parietal placentas ; stigmatic lobes broad, sometimes petal-like. Capsule 

 ovoid or oblong, indehiscent or bursting irregularly. Seeds few or numerous, 

 with a orustaceous testa. — Herbs either aquatic and floating or creepnig m 

 swamps. Leaves ovate or broad. Pedicels 1 -flowered, either in the tutts 

 of leaves or 2 together or clustered at the nodes of the weak stems or close 

 to an almost terminal sessile leaf, so as to appear to be inserted on the petiole. 

 Flowers yellow or white. 



The genus, although with very few extra-Australinu species, is widely dispersed over e 

 temperate and wanner regions of the globe. Of the seven Australian species, one la 

 coimnou in most tropical countries, the six others are endemic. F. Mueller proposes to re- 

 unite this genus with ViUarsia. That would, however, entail the re-uhiting *^^^.!|r^ 

 tribe of Meayanihede iulo the Linniean genus Meni/aalhes^ ^vhich would then be divi ^^ 

 into sections corresponding with the present genera, a course which does not appear o 

 of much practical advantage, whilst it would add above twenty names to the syuonyiuy. , 



Leaves almost sessile under the cluster of pedicels which appear as 

 if inserted on the petiole. Flowers white. 

 Leaves 2 to 8 in. diameter. Calyx 3 to 4 lines long . - . , 1. i- indicum. 

 Leaves under 1 in. diameter. Calyx 1 line long. Stems filiform. 3. L. minimum. 

 Leaves all on long petioles. Pedicels usually 2 together at the 

 nodes of almost leafless stems. Flowers'yellow. 

 Leaves mostly crenate. Corolla-lobes with a lonsitudinnl central 



wing inside 3. X. crenalinn. 



LeavL. entire. Corolla-lobes without any longitudinal wing. 

 Calyx-segments above 2 lines long. Corolla mucli larger. 



Leaves usually with a deep narrow sinus. Seeds smooth . 



or tuberculate, glabrous 4. 4 geminatnm. 



Leaves usually truncate or with a broad open sinus at the , , 7 ,./>;M 



base. Seeds densely velvety-pubescent 5. X. h!/drocluuo 



Calyx-segmentd under H lines long. Corolla small. Stems 



filiform. Leaves ovate orbicular or with a broad opca 



sinus; 



Howering stems elongated, many-flowered 6- L- ^-^{^if^^^^^^^' 



FioweriDg stems short, few-flowered ...... . 1. L. ejnf/uum> 



1. L. i-ndicum,. T/iw. Enum. Fl. Ceyl. 205, not of Griseh.^ ^^^'"^i'X 

 a submerged tuft formed the preceding year, simple, resembling a pe ^^^^ 

 bearing a aiugle terminal floating leaf, nearly sessile, and just below lU ^^'_ 

 exceedingly sliort petiole an unilateral tuft of pedicels aud yoii"g "^ ^^; 

 which tuft ultimately sinks, the old tuft and stem dviug away. Leav 

 bicular or broadly oval, deeply cordate, usually entire, witli a dose or ^1.^^ 

 sums, of a thick consistence, palmately veined and reticulate, but "i^ • 

 not promment and often very obscure, not above 2 in. diameter in soine p^ ^^ 

 mens, above 8 in. in others. Pedicels usually numerous in the clustei-s, ^^ 

 2 m. long. Calyx-segments lanceolate, membranous, 3 to -i lines 'oiig- ^^^ 

 rolla white, varying from 6 to 10 lines diameter, the margins fi'ii'S'^ ' 



