CLASS XV. ORDER XIII. 57 



Sistm"brium. Calyx mostly spreading, equal at the base; silique sub-terete; 

 cotyledons incumbent, sometimes oblique, flat, (hedlte-mustard.^ 



ERysi"MUM. Silique sub-terete, often short; valves concave, nerveless, not 

 heeled ; calyx equal, spreadinc; ; cotyledons accumbent. (English water-cress.) 



Hes"peris. Calyx closed, furrowed at the base, shorter than the claws of the 

 petals; petals bent obliquely, linear or obovate; silique 4-sided, 2-edged ; stig- 

 ma sub-sessile of 2 lobes ; cotyledons incumbent, (rocket.) 



CLASS XV. MONADELPHIA. 



ORDER III. TETANDRIA. 



SisraYN"cHiuM. Spatha 2-leaved ; perianth ; corolla superior, 6-cleft or 6-pe- 

 lalled, tubular; style 1 ; stigma 3-cleft; capsule 3-celled. (blue-eyed grass.) 



Tamarin"dus. Petals 3, ascending; 3 filaments longer; legume 1 to 3-celled, 

 pulpy inside, (tamarind) Ex. 



Tigri'dia. Calyx 0; petals 6; tube made by the union of the filaments, long, 

 (tiger-flower.) Ex. 



ORDER V. PENTANDRIA. 



Passiplo''ra. Calyx 5-parted, coloured ; corolla 5-petalled, on the calyx; nec- 

 tary a triple, filamentous crown within the petals; gourd-like berry, pedicelled. 

 (passion-flower.) .S. 



Ero'dium. C.ilyx 5-leaved ; corolla 5-petalled ; nectariferous scales 5, alter- 

 nating with the filaments ; arils 5, 1-seeded, awned ; beaked at the base of the 

 receptacle ; awn spiral, bearded within. Taken from geraniun> (stork's 

 bill.) Ex. 



Oplothe'ca. Calyx double, outer 2-leaved, convolute, truncate, scarious; 

 inner calyx 1-leafed, muricate, somewhat 5-cleft, downy, longer than the outer 

 calyx; nectary cylindric, '5-toothed, stamens in the nectary; stigma single, 

 hairy; capsule bladder-like, enclo.sed in the calyx, 1-seeded. S. 



Acyran"thes. Calyx double, permanent, membranaceous ; outer calyx 3- 

 leaved, inner 5-leaved, unequal; seed 1, covered by the converging calyx. S. 



Malachoden"dron. Calyx bracted; petals 5-G; limb crenulate ; germ 5-stri- 

 ate; stigmas capitate; capsules 5, united, seed 1. S. 



ORDER VII. HEPTANDRIA. 



Pelargo'nium. Calyx 5-parted, upper division broader, ending in a capillary 

 nectariferous tube; corolla 5-petalled, irregular; the 2 upper petals usually 

 broader, with coloured veins; filaments 10, 3 of them usually without anthers; 

 arils 5, each 1-seeded, awned ; some of the awns spiral, (stork geranium.) Ex. 



ORDER VIII. OCTANDRIA. 



Pis"tia. Spatha ligulate, hooded ; corolla 0; filament lateral; anthers 3 to 8; 

 style 1 ; capsule 1-celled, many-seeded. S. 



ORDER X. DECANDRIA. 



Gera'nium. Calyx 5-leaved ; corolla 5-petalled, regular; nectariferous glands 

 5, adhering to the base of the 5 alternating long filaments ; arils 5, 1-seeded, 

 awned, beaked at the elongated top of the receptacle; awn naked or .smooth 

 within, straight, (cranebill, false crowfoot, herb robert.) 



Aca'cia. Polygamous; calyx tubular, 5-toothed; petals 5; stamens 5 to 10, 

 exsert ; pod 1-celled, 2-valved. 



Schrank"ia Polygamous; calyx 5-toothed, tubillar; petals 5, stamens 8 to 10, 

 exsert ; pod 4-valved. 



ORDER XIII. POLYANDRIA. 



Si'da. Calyx simple, angular, 5-cleft; style many-parted; capsules many, 

 arranged circularly, 1-celled, 1 or 3-seeded. Pedicel articulate under the apex. 

 (Indian mallows.) 



Alth.e'a. Calyx double, outer one 6 or 9-cleft; capsules many, arranged cir- 

 cularly, l-seeded. (hollyhock.) 



Mal"va. Calyx double, outer one 3-leaved, inner one S-cleft; capsules many, 

 arranged circularly, 1-celled, 1-seeded. (mallows.) 



HiBis"cus. Calyx double, outer one many-leaved; inner one about 5-cleft; 

 atigmJLs 5 ; capsule 5 or 10-celled, many-seeded, (marsh mallows.) 



