SYNOPSIS OF THE FAMILIES XUl 



XX. Platanaceae (p. 343). Flowers monoecious, in dense unisexual capitate heads; 

 fruit an akene ; leaves simple, alternate, with stipules, deciduous. 



XXI. Rosaceee (p. 348). Flowers perfect ; sepals and petals 5 (petals in Cercocar- 

 pus) ; ovary inferior in Mains, Sorbus, Cratcegus, and Amelanchier ; fruit a drupe (Hetero- 

 meles, Frunus, and Chrysobalanus), a capsule (Vauquelinia and Lyonothamnus), an akene 

 (Cercocarpus), or a pome (Mains, Sorbus, Cratfeg-us, and Amelanchier) ; leaves simple 

 or pinnately compound, alternate [opposite in Lyonothamnus), with stipules, deciduous or 

 persistent. 



XXII. Leguminosae (p. 533). Flowers perfect, regular or irregular; fruit a legume; 

 leaves compound, or simple (Dalea), alternate, with stipules, deciduous or persistent. 



XXIII. Zygophyllaceae (p. 578). Flowers perfect; calyx 5-lobed ; petals 5; fruit 

 capsular, becoming fleshy ; leaves opposite, pinnate, with stipules, persistent. 



XXIV. Rutaceae (p. 580). Flowers unisexual or perfect ; fruit a capsule (Fagara), a 

 samara (Ptelea), of indehiscent wing-ed 1-seeded carpels (Helietta), or a drupe (Amyris) ; 

 leaves alternate or opposite, compound, glandular-punctate, without stipules, persistent or 

 rarely deciduous (0 in Canotia). 



XXV. Simarubaceae (p. 589). Flowers dioecious, calyx 5-lobed; petals 5; fruit 

 drupaceous ; leaves alternate, equally pinnate, without stipules, persistent. 



XXVI. Burseraceae (p. 591). Flowers perfect ; calyx 4 or 5-parted ; petals 5 ; fruit 

 a drupe ; leaves alternate, compound, without stipules, deciduous. 



XXVII. Meliaceae (p. 593). Flowers perfect ; calyx 5-lobed ; petals 5 ; fruit a 5-celled 

 dehiscent capsule ; leaves alternate, equally pinnate, without stipules, persistent. 



XXVIII. Euphorbiaceae (p. 594). Flowers perfect; calyx 4-G-parted (Drypetes), 3- 

 lobed (Hippomane), or (Gymnanthes) ; petals ; fruit a drupe (Drypetes and Hippomane), 

 or a 3-lobed capsule (Gymnanthes). 



XXIX. Anacardiaceae (p. 601). Flowers usually unisexual, dioecious or polygamo- 

 dioecious ; fruit a dry drupe ; leaves simple or compound, alternate, without stipules, decid- 

 uous (persistent in one species of Rhus). 



XXX. Cyrillaceae (p. 610). Flowers perfect; calyx 5-8-lobed; petals 5-8; fruit an 

 indehiscent capsule ; leaves alternate, without stipules, persistent (more or less deciduotis in 

 Cyrilla). 



XXXI. Aquifoliaceae (p. 613). Flowers polygarao-dioecious ; calyx 4 or 5-lobed; 

 petals 5 ; fruit a drupe, with 4-8 1-seeded nutlets ; leaves alternate, simple, with stipules, 

 persistent or deciduous. 



XXXII. Celastraceae (p. 619). Flowers perfect, polygamous or dioecious; calyx 4 or 

 5-lobed ; petals 4 or 5 ; fruit a drupe, or a capsule (Evonymus) ; leaves simple, opposite or 

 alternate, with or without stipules, persistent (deciduous in Evonymus). 



XXXIII. Aceraceae (p. 624). Flowers dioecious or monoeeiously polygamous ; calyx 

 usually 5-parted ; petals usually 5, or ; fruit of 2 long-winged samara joined at the base ; 

 leaves opposite, simple or rarely pinnate, without or rarely with stipules, deciduous. 



XXXIV. Hippocastanaceae (p. 643). Flowers perfect, irregular; calyx 5-lobed; 

 petals 4 or 5, unequal ; fruit a 3-celled 3-valved capsule ; leaves opposite, digitately com- 

 pound, long-petiolate, without stipules, deciduous. 



XXXV. Sapindaceae (p. 649). Flowers polygamous ; calyx 4 or 5-lobed ; corolla of 



4 or 5 petals ; fruit a berry (Sapindus and Exothea), a drupe (Hj'pelate), or a 3-celled 

 capsule (Ungnadia) ; leaves alternate, compound, without stipules, persistent, or deciduous 

 (Ungnadia) . 



XXXVI. Rhamnaceae (p. 657). Flowers usually perfect ; calyx 4 or 5-lobed ; petals 4 or 



5 (0 in Beynosia, Condalia, and Krugiodendron) ; fruit drupaceous ; leaves simple, alternate 

 (mostly opposite in Beynosia and Krugiodendron) , with stipules, persistent (deciduous in some 

 species of Bhamnus). 



XXXVII. Tiliaceae (p. 669). Flowers perfect; sepals and petals 5 ; fruit a nut-like 

 berry ; leaves simple, alternate, mostly oblique at the base, with stipules, deciduous. 



