SAPINDAOE^. 427 



slender exserted, stigmatose at apex simple not dilated; cells 4, 

 alternipetalous ; ovules in eaoh 2, collaterally descendent, incom- 

 pletely anatropous; micropyle extrorsely superior. Fruit capsular 

 membranous venose, inflated 4-lobed, shortly 4-winged, loculicidally 

 4-valvate; valves septiferous. Seeds in cells J, 2, subreniform; 

 testa coriaceous corrugate ; cotyledons of exalbuminous or scarcely 

 albuminous embryo foliaceous oblong; radicle short straight supe- 

 rior. — A rigid ramose shrub; leaves on short twigs alternate or 

 fasciculate, simple entire linear-oblong subcoriaceous, scarcely peti- 

 olate exstipulate; flowers axillary solitary or few pedunculate. 

 {South Africa.) See p. 371. 



VIII. ACERE^. 



73. Acer T. — Flowers hermaphrodite or oftener polygamo-dioe- 

 cious ; calyx 4-12-, oftener 5-partite or fid, imbricate, generally 

 deciduous. Petals same in number alternate, imbricate, or 0. Sta- 

 mens equal to number of alternate petals ; filaments free variously 

 inserted more or less within or without an annular lobate thick or 

 thin, sometimes obsolete disk, filiform or sometimes capillary ; 

 anthers introrse, sometimes linear, 2-rimose. Germen central, 

 2-lobed, 2-locular (or more rarely 3-merous), contrarywise com- 

 pressed to septum (in male flower rudimentary, effete or 0) ; style 

 inserted between lobes of germen, divided at base or more or less 

 above into 2 (or 3) linear branches, far stigmatose within and to the 

 apex. Ovules in cells 2, collaterally or subsuperposed ascendent ; 

 micropyle finally extrorsely inferior ; placenta dilated around hilum 

 in a broad (arilloid) process. Fruit 2 (more rarely 3) samarse, diva- 

 ricate, indehiscent, produced externally above to elongate obliquely 

 dilated coriaceous or membranous reticulately nerved wings. Seeds 

 ascendent compressed; testa membranous, arillate to hilum; endo- 

 pleura fleshy or mucous; cotyledons of conduplicate embryo thin 

 irregularly plicate ; radicle rather longer inferior. — Large or small 

 trees ; juice aqueous, saccharine, or milky ; leaves opposite petiolate 

 exstipulate, simple, entire, palmately or subpedately 3-7-lobed, 

 sometimes {Negundo) pinnately 8-5-foliolate ; flowers m axillary or 

 terminal compound cymiferous racemes or corymbs. — Temperate 

 Europe, Asia, and North America, Java.) See p. 373. 



