Family 11. RUT ACE AE 



By Percy Wilson 



Aromatic, armed or unarmed trees or shrubs, or shrubby herbs, some- 

 times scandent, with secreting glands in their bark, foliage, and fruits. Leaves 

 alternate or opposite, pinnately or digitately compound, unifoliolate, or simple, 

 without stipules ; petioles often wing-margined. Leaflets or leaf-blades fre- 

 quently inequilateral at the base, entire, crenulate, or serrulate. Flowers 

 perfect, polygamous, or dioecious, in axillary or terminal cymes, panicles, 

 racemes, or spikes, or sometimes solitary. Calyx with 3-5 lobes or sepals, or 

 rarely more, in one or occasionally two serieSj or rarely wanting. Corolla of 

 3-5, or rarely more, usually imbricate petals, or is, a few genera gamopetalous. 

 Androecium of as many stamens as there are petals or twice as many, or some- 

 times more ; filaments distinct or united below, inserted on a hypogyiious disk 

 or in the gamopetalous genera more or less adnate to the corolla-tube ; antnc^ 

 introrse, 2-celled, often tipped with a gland. Gynoecium of 1-5, or more, 

 sessile or stipitate, free or united carpels ; styles free or connate, terminal 

 or sometimes lateral ; stigma simple or lobed. Ovules 2, or rarely 4, or more, 

 in each cavity. Fruit a follicle, capsule, samara, drupe, or berry. Seeds soli- 

 tary or several in each cell, with an often crustaceous, furrowed or punctate 

 testa, with or without endosperm ; radicle superior. 



A. Fruit capsular, follicular, or samaroid. 



Corolla gamopetalous ; filaments more or less adnate to the corolla-tube. 

 Sepals in a single series, subequal, more or less united. 



Calyx large, subequal to the corolla-tube in length ; seeds 2 in each 



carpel. 1. Erythrochiton. 



Calyx small, less than half the length of the corolla-tube ; seed solitary 

 in each carpel. 2. Galipea. 



Sepals in 2 series, the two outer larger than the inner. 



Filaments united at the base with the corolla-tube ; ovary 2-celled. 3. POMPHIDEA. 



Filaments adnate to the corolla-tube throughout its length ; ovary 4- 

 or 5-celled. 4. Ravenia. 



Corolla polypetalous ; filaments free from the petals. 

 Ovules 2, or occasionally solitary, in each carpel. 

 Fruit capsular or follicular. 



Stamens as many as the petals. 



Flowers dioecious or polygamous ; disk inconspicuous. 



Fruit a 2-celled (rarely 3-celled), tardily-dehiscent, tough, 



nut-like capsule, more or less distinctly margined. 

 Fruit of 1-5, 2-valved follicles. 

 Flowers perfect ; disk conspicuous, commonly surrounding the 

 ovary. 

 Fruit of 1-5, 2-valved follicles often more or less united at the 



base; ovary not tuberculate ; inflorescence racemose. 

 Fruit a 4-celled or 5-celled woody capsule ; ovary usually tuber- 

 culate ; inflorescence paniculate. 

 Stamens twice as many as the petals, or moie. 

 Calyx persistent in fruit; leaves pinnate. 

 Ovary 2-celled ; calyx 4-parted. 

 Ovary 5-celled. 



Calyx of 5, distinct or nearly distinct sepals ; carpels 



rounded on the back ; leaflets many-paired. 

 Calyx 5 dentate ; carpels grooved on the back, the edges 

 wing-like ; leaflets 4- or 5-paired. 

 Calyx deciduous; leaves digitate. 



Stamens twice as many as the petals ; leaves opposite ; sepals 

 subequal. 

 Volume 25, Part 3, 1911] 



