^ 





t 



XLV. HALORAGEiE. 471 



inferior, small, indehiscent, with 1 to 4 cells and seeds, or divisible into 2 to 4 

 1-seeded indelilscent carpels. Seeds pendulous, with a membranous testa ; 

 embryo cylindrical, in the axis of a fleshy albumen; radicle long, superior; 

 cotyledons small.— Herbs, often aquatic, or undershrubs. Leaves opposite 

 whorlec] or alternate, without stipules. Flowers smaU, often unisexual or 

 incomplete, axillary or rarely in terminal corymbs racemes or panicles. 



The Order is dispersed over nearly tlie wliole globe. Of the Australian genera, 2 small 

 ones are endemic ; the principal one is also chiefly Australian, but two or three of the spe- 

 cies extend also into Eastern Asia, or arc. with a fourth genus, widely spread over the extra- 

 tropical regions of the sonthern hemisphere. The three others are aquatic plants, representea 

 nearly ail over the globe. 



A. True Halorage«.-2^^«;m mfh j>da!s, at least in the males, answering to the 

 ordinal characters given above. 



Petals, at least in the males, induplicate, ki-cled. Fruit a nut-like 

 or rarely spotigy, undivided drupe. 

 Flowers in deusetcrminal corj^nibose panicles, 2- 3- or 4-merous. t q^.j^qj^j^^ 



Dissepiments of the ovarv evaiiesceut ' * * ' ^ V \'* 

 Flowers solitary or clustered within each bract, along the rhachis 



of simple or paniculate terminal racemes. Ha^loragis 



Flowers 3- or 4-merous • . . . . g j^j^^q^^.^ctls. 



1^ lowers 2-raerous , ' , Vi ' 



Petals ia the males imbricate. Fruit separable into 2 or 4 nut-like ^ jj^.^jQp^yLLUM. 

 carpels. Aquatic or mud plants 



B. Anvmalous genera of a very reduced type allied to Haloragea,, lut often referred to 

 MonochlamydeEb." Flowers unisexual. ■ 



Calyx-teeth minute. Petals (in Australisn species) none. Stamens 

 2. Ovary l-eelled, with 1 ovule. Styles 2 or rarely 4. ierres- p 



trial stemless plants, with broad radical leaves and radical scapes 5. Gu^Ni.EA. 



Perianth none. Flowers surrounded by bracts. Stamens several. 

 Ovary l-celled, with 1 ovule. Styles 2. Hoating plant, with ^ ^^^^^^,,^^^^^^, 



verticillate dichotouious leaves i * c+ ' ' 1 * 



PeriaDth none. Flowers with or without 2 bracteolcs. btamen i. 

 Ovaiy 4-cellcd, with 1 ovule in each cell. Styles 2. Aquatic or calutkiche. 

 mud plant, with opposite entire leaves 



A. True IIalokage.e. 



P 



1. LOUDONIA, Liudl. 



(Glischrocarj-OD, EndL) 



Calyx-tube or ovary with 2 to 4 longitudinal wings ^^ angles; lob^^^^^^^^ 

 V^ort, alternating with the wings. ■ Petals ^^^ T'-^^^ f^^^^ 1 ^^^ 

 Plicate, deciduous. "Slameus twice as many as petals ; ^^'^^^f^^^^^^^' C 

 «i«tent ; anthers oblong or linear, deciduous. Ovaiy l-^^^'^^f ' f ^jf t^'^ * p n 



ulcus ovules, or imperfectly divided into ^-^^^^^"^^ 



Wk, with terminal obtuse stigmas. . f ^ wiU a perenu^^^ ro tstock'and 

 yx winged or inflated.-aiabrous herb v«^^ a Perenn^al ^^^^^ ^^^^.^^^ 



«rect stems. Leaves alternate, linear. J lowers ytuuw, 



<^OJ'mbose panicles. , ,., , jr.joraais more in habit and inflores- 



The genus is limited to Australia. It differs from ^f Tf peX are distinguished from 

 *"«e than in floral characters. The characters by which the species are b 



. . . 3. i. Bt'hrii. 



--'^ man m lloraL characters, lue cnaracici^ »; ..-.^- 



*=^cli other may possibly not be found to be really confitaut 



pi 



'^^ers 2-merous, rarely 3-merou8 



