406 Liu. haloraoe^ (oliver). [Gunnera. 



putamen. — Scapigerous herbs. Leaves radical, petiolate, reniform 

 cordate or ovate, often rugose. Staminate flowers crowded towards 

 the extremity of the inflorescence. 



A small genus, very local but widely spread, especially in the Southern hemisphere. 



1. G. perpensa, Linn. ; DC. Prod. xvi. 2, 598. Leave's rotundate- 

 reniform with a deep basal sinus dilated at the insertion, the lobes 

 rounded and overlapping the petiole below, unequally crenate- dentate, 

 shortly appressed-hirsute on both surfaces, about 6 in. in diameter in 

 our only specimen, the sinus about 2-2^ in. deep ; petiole 10 in. or more. 

 Panicle 20—24 in., spiciform, branches slender, successively shorter 

 from below, erect, the lower compound. Calyx-teeth of pistillate 

 flowers 2, fleshy, triangmlar, opposite ; of the staminate flowers vari- 

 ously deformed, 1-4-toothed. Petal when present linear. Anthers 

 2 or 1 subsessile.— Bot, Mag. 2376. 



Nile Land. Abyssinia, Dr. Both I 

 Also at the Cape and Natal. 



3. CALLITRICHE, Linn. ; Benth. et Hook. f. Gen. Plant, i. 676. 



Flowers minute, axillary, solitary, achlamydeous, unisexual. Male 

 flower : Stamen 1, often bibracteolate, filaments filiform ; anthers as 

 broad as long. Ovary 4-lobed, 4-celled, ovules solitary ; styles 2, subu- 

 late or filiform. Fruit 4-lobed, 4-seeded, small, indehiscent. — Gla- 

 brous herbs, aquatic or limnophilous ; stems often elongate, slender. 

 Leaves opposite, entire, linear or spathulate. 



A small cosmopolitan genus. 



1. C. stagnalis, Scop. ; Hegelmaier, Monog. Callitriche, 58. Leaves 

 obovate- or oblanceolate-spathulate, when growing in water the upper 

 usually forming a rosette. Fruit sessile or subsessile, nearly orbicular, 

 compressed tetraquetrous, the margins distinctly narrowly winged 

 (stigmas persistent, Hegel. 1. c). 



Nile Land. Abyssinia, Schimper. 



Widely spread in the Old World. I have not myself seen Abyssinian specimens. 



Order LIV. RHIZOPHORACEiE. (By Prof. Oliver.) 



Flowers usually hermaphrodite, regular. Calyx more or less adhe- 

 rent to the ovary or free, limb 4-14-toothed -lobed or -partite ; lobes 

 valvate, usually coriaceous and persistent. Petals as many as calyx- 

 lobes, perigynous or subhypogynous, apex frequently 2-oo -fid, margins 

 often conduplicate. Stamens 2-4 times as many as petals, epi- peri- or 

 subhypogynous, inserted below or upon the margin of the disk ; fila- 

 ments free, various'; anthers 2-celled, dehiscing longitudinally (multi- 

 locellate in Rhizophora). Ovary more • or less adherent or free, 2-5- 

 celled or dissepiments partially suppressed. Ovules geminate, collate- 

 ral, pendulous (or solitary in Anisophyllea) ; style 1 simple (or 4 in 



