22 ILLUSTRATIONS OF INDIAN BOTANY. 



They also approach Myrtaceae through Faschia,\m\ differ in the absence of pellucid dots 

 and in haviucr definite stamens. This last character equally distinguishes them from PhiladeU 

 pheae. The filiform style and absence of albumen separate them from Haloragme^ from which 

 they also differ in habit. They have also been compared with Loaseaehxxt are readily distin- 

 guished by their binary, not quinary, arrangement of the parts of the flower which mark that 

 order, leaving altogether out of consideration the acrid stinging properties possessed by Loaseae. 



Geograpfucal DrsTRiBUTiON. The species of this order are numerous, amounting 

 according to DeCandoUe's I'rodromus to 248, including Trapa and Circcea^ the greater por- 

 tion of which are American, though, to some extent, found in all countries from the extreme 

 north, through every degree of latitude, to the equator, and thence nearly 50 degrees south, but 

 most abound in the temperate regions. In India, within the tropics, the species are few and 



iji 



In the more temper- 



ate regions of the Himalayas thirteen species of Epilobium have been found, one of which has 

 been figured by Dr. Royle. 



Properties and Usks. Of these almost nothing is known. The roots of the evening 

 primrose u^nothera biennis are edible, and it is cultivated for their sake. 



Remarks o>f Genera and Species. In an order containing only two genera wifhin the 



limits to which this work extends, there is not much room for remark on this division of the 

 subject, yet I cannot altogether pass it over, as I think we have more genera than we can find 

 good characters for. Jussicei is readily distinguished by having twice as many stamens as petals, 

 but in both Ludwigia and Isnardia they are the same, and in truth, so far as I can discover, 

 there is no good difference between these genera, the plant here figured, which is unquestionably 

 a Ludwigia, seems to agree equally well with the character of Isnardia. 



EXPLANATION OF PLATE lOL 



Ludwigia parviflora. 5. Ovary cut longitudinally. 



1. Small plant-KQ/uraZ size. 6. Mature capsule splitting, showing the ripe seed. 



2. Expanded flower. 7. Qvarj cut transversely, 4-ceUed, with several rows 

 ,• ^^tamens. of ovules in each— a// wore or less maenified. 



4. Capsule cut transversely. jsfos. 4 and 7, are misplaced. 



Sub-order Circ^e^. 



This sub-order consists of but one genus, essentially distinguished from all the true Ona- 



granae on the one side by the cells of its ovary having only one ovule, and from Hudrocaryes 

 on the other, by its ovules being erect not pendulous. 



From //a/ora^.me it is equally distinguished by its erect, not pendulous, ovules, and still 

 further by its ex-albuminous seed. The following is Lindley's character of both the sub-order 



and genus. 



fK.i .^^'>?.«"P«"«^' ^«"^«o«s. tubular, with a two-parted limb. Petals 2, alternate with 

 W Z 1, riir Stamens 2, alternate with the petals, inserted into the calyx. Disk 

 sTr'n^n llT '^K "^ ""P^^ whole of the tube of the calyx, and projecting beyond it. Ovary 

 LtJ r"'\!: ^?„.^!;f .?.?^'" f^^^^ r^ ' f^'^ .ia.ple, arising out of thl disk ; stigml 



emarginate. Fruit 2 ( 



^maxgumie. rruic z (^or I j ceiiea, '^-valved, 2 (or I) seeded. Seeds solitary erect • albumea 



stalked. Flowers m terminal and lateral racemes, covered with uncinate hairs." 

 Affinities. These have been already pointed out under the preceding order. 



A.«i. and Asia-R„j,e has Egu.ed cae fro. iCh\Z:y.^'LriZl ZTu:'bothX' 



