204 



SAPINDACE^. (MAPLE FAMILY.) 



Order XXXn. SAPINDACEiE. (^Iaple Faahlt). 



Trees or shruhs with polygamous^ dioecious, or (rarely) 

 hermaphrodite fioioers, the 4-5 sepals imhricated^ the petals 

 3-5, or 0, the stamtiis 5-10, the ovary l-^-oelled, and the cells 

 1-2-ovuled — Leaves simple or compound. Flowers regular 

 or irregular. Sepals free or more or less connate, often un- 

 equal. Disk complete or one sided. Stamens inserted within 

 or on the disk. 0\''arj central or excentric. Ovules amphi- 

 tropous or anatropous, with ventral raphe, and inferior mi- 

 cropyle. Style usually 1. Fruit a capsule or key. Seeds 

 usually without albumen, arilled or naked. 



1. ACER. Flowers polygamous. Fruit a double key. 



2, STAPHYLEA, Flowers hermaphrodite. Fruit a membranous, 2-3-ceUed capsule. 



1. ACER. L. Maple. Qaiqab. 

 Calyx 5-parted, deciduous. Petals as many as calyx-lobes or 0. 

 Filaments of male flowers longer than those of the hermaphrodite. 

 Ovary flattened contrary to septum, cells 2-ovuled. Styles 2, filiform. 

 Key with two, long wings. Embryo conduplicate ; cotyledons irregular- 

 ly folded — Trees with simple, opposite leaves. 



Fm. 85. 

 b d 



(i) Leaf of a species of Maple, (b) Branch with clusters of staminate flowers, subtended by 

 imbricateri bracts, (o A staminate flower, showing the long filaments, (d) A branch with 

 clusters of fertile flowers, subtended by imbricated bracts, (e) A single fertile flower show- 

 ing the anthers, which peer over the edge of the calyx, and the two styles. (/) The same 

 enlarged, with the floral envelopes removed to show the short filaments. (or) A cluster of 

 immature samaras, th) A mature samara, showing the two wings, and the cells, compressed 

 contrary to the partition. 



