KEY TO THE FAMILIES. 



29 



H 



H 



J. Flowers irregular ; sepals and petals 4-6, the 

 petals more or less cleft , stamens many, on a 

 disk below the ovary, ovary 1 -celled, open at 

 the summit, with 3-4 parietal placentas, bearing 



numerous ovules (Mignonette) 



Order Sarraceniaes. Flowers regular ; sepals, petals, 

 and stamens 4-5 ; ovary superior, with 3-5 parietal 

 placentas and styles ; capsule ; herbs with glandular- 

 hairy insectivorous leaves ; seeds albuminous (Sundew) 

 Order Rosales. Flowers double ; carpels solitary or 

 several together, distinct or united ; ovary superior, 

 except in some Saxifragaceae and Rosaceae. 

 K. Seeds with copious albumen and small embryo ; 

 flowers regular, bisexual. 



Sepals and petals 4-9 ; stamens numerous, on a 

 small disk ; ovary superior or nearly so, 2-celled, 

 with parietal placentas, many ovules and 2 free 

 styles ; shrub with opposite trifoliolate leaves 

 Sepals and petals 5 ; stamens 5 ; ovary 1 -celled, 

 with 2-5 parietal placentas, or more or less 2-5- 

 celled : style simple ; capsule or berry ; trees, 



shrubs, or twining undershrubs 



K. Seeds with little or no albumen. 



L. Seeds usually several, attached to the ventral suture 

 in 2 rows. 



Flowers regular, bisexual ; sepals, petals, 

 stamens, and distinct carpels 4-5 ; succulent 



herbs 



Flowers bisexual, regular (in Mimosoideae), 

 slightly irregular (in Caesalpinioideae), very 

 irregular (in Papilionatae) ; calyx-lobes 5 ; 

 petals 5, often partly united ; stamens usually 

 10, or (in Acacia), numerous ; carpel solitary ; 

 fruit a pod ; trees, shrubs, or herbs (Peafiower, 



Clover, Wattle, Acacia) 



L. Seeds 1-2 in each carpel. 



Flowers usually bisexual and regular ; sepals and 

 petals usually 4-5 ; petals sometimes wanting ; 

 stamens numerous ; carpels 1-many, superior or 

 united to the wall of the hollow receptacle ; 



shrubs or herbs (Rose Family) 



H. Order Geraniales. Sepals and petals 5, sometimes 

 united at base, rarely absent ; ovary superior, several- 

 celled, of united carpels, which often separate when 

 ripe ; ovules usually 1-2 in each carpel, anatropous, 

 either pendulous with a vental rhaphe and superior 

 (epitropous) micropyle, or, when more than 1 ovule is 

 present, some are ascending with a dorsal rhaphe and 

 inferior (apotropous) micropyle. 

 M. Sepals and petals present ; flowers bisexual. 

 N. Anthers opening by longitudinal slits ; flowers usually 

 regular ; seeds usually with scanty albumen or 

 none. 

 0. Sepals and petals 5 ; stamens usually 10, often 

 united at base. 

 P. No disk. 



Fruit separating into 5 fruitlets with awns 

 (styles) elastically rolled upwards ; herbs or 



undershrubs (Crane's-bill) 



Fruit a 5-celled capsule opening by valves ; 



herbs (Woodsorrel, Soursob) 



P. An entire or divided disk present, below or 

 around the ovary ; sepals and petals 4-5 ; 

 stamens as many or double as many. 

 Leaves of 2 leaflets or pinnate, stipulate, with- 

 out glandular dots ; ovary 4-5 celled, with 1 

 style (Nit aria has no disk, 15 stamens and 

 simple leaves) ; capsule, drupe or fruitlets ; 

 shrubs or herbs 



Resedaceae 54. 



Droseraceae 55. 



Saxifragaceae 57. 



PlTTOSPORACEAE 58. 



Crassulaceae 56. 



Leguminosae 60. 



Rosaceae 59. 



Geraniaceae 61. 

 oxalidaceae 62. 



Zygophyllaceae 64. 



