162 FLOP A OF MADPAS. [Citrus. 



Citrus Awrantium, Linn., the Orange, and C. decumana, Linn., 

 the Pumelo, or Shaddock, are also much cultivated, the former 

 frequently found run wild. 



Family XXXY. SIMARUBACEAE. 



Trees or shrubs, usually with bitter bark and sometimes wood. 

 Leaves alternate, pinnate, rarely simple ; stipules or deciduous. 

 Flowers regular, small, 1-sexual or polygamous rarely her- 

 maphrodite, in axillary cymes racemes or panicles. Calyx 3-5- 

 lobed. Petals 3-5, rarely 0, valvate or imbricate. Dish annular 

 or elongated, simple or lobed, rarely 0. Stamens as many as or 

 twice as many as the petals, rarely indefinite, inserted at the base 

 of the disk ; filaments free, often with a scale at the base ; anthers 

 oblong, usually introrse, dehiscing longitudinally. Ovary free, 

 1-6-celled, usually deeply lobed ; styles 2-5, free or united ; 

 stigmas capitate plumose or minute ; ovules usually 1 in each 

 cell. Fruit usually of 2-6 distinct carpels, sometimes samaroid 

 sometimes indehiscent drupaceous. Seeds usually solitary, erect 

 or pendulous ; albumen fleshy scanty or ; cotyledons plano- 

 convex or flat ; radicle superior. 



Ovary deeply divided : 



Leaves pinnate ; fruit samaroid ; large trees 1. Ailanthus. 



Leaves simple; fruit drupaceous, winged, small trees. ..2. Samadera. 

 Ovary entire ; leaves 2-foliolate, small ; flowers small, green, fruit a 

 large one-seeded drupe; small thorny trees 3. Balanites. 



1. Ailanthus, Desf. 



Tall trees. Leaves very large, alternate, imparipinnate ; leaflets 

 alternate or subopposite, unequal-sided. Flowers small, poly- 

 gamous, in terminal or axillary branched panicles, bracteolate. 

 Calyx short, 5-lobed. Petals 5-6, valvate. Disk 10-lobed. 

 Stamens in <y flowers 10-12, in fewer, in ? wanting, inserted 

 at the base of the disk ; filaments short or filiform ; anthers ovate 

 or oblong, introrsely or laterally dehiscing. Ovary in <? rudi- 

 mentary, in others 2-5 -celled, the carpels compressed, more or 

 less distinct; styles from below the apex, connate above ; stigmas 

 plumose ; ovule 1 in each cell, semianatropous. Fruit of 1-5, 

 single-seeded, oblong samaras with large membranous wings. 

 Seed pendulous, compressed ; testa membranous ; albumen very 

 scanty or ; cotyledons flat, fleshy ; radicle small, superior. 



