214 FLORA OF PHILADELPHIA. 



Fruit oval, flat on the face, longer than the styles. 



. 2. C, palustris. 

 Fruit obovate, plano-convex, shorter than the styles. 



' '• 3. C. heterophylla. 



Bracts none ; leaves all linear, submerged. 4. C. bifida. ' 



1. Callitkiche Austini Engelm. M. p. 596. Damp, shaded places. Sum- 



mer. 



2. Callitriche palustris L. M. p. 597. In cold or running water. 



Summer. 



3. Calliteiche heterophylla Pursh. M. p. 597. Ponds and slow streams. 



Summer. 

 Bucks— EockHill (Fr.) (Ja.) (Ke.). Berks— Hamburg (Ke.). North- 

 ampton— (P.). 



New Jersey — Common. 



New Castle— Blackbird Head, Canby. 



'4. Callitriche bifida (L.) Morong. hi. p. 597. Flowing water. Summer. 

 Bucks— Near Sellersville (Fr.). . . 



Order 16. SAPINDALES. 



Flowers regular or nearly so (except in Hippocastanaceae, which are trees or 

 shrubs with digitately compound leaves). 

 Petals none; flowers monoecious or dioecious; leaves evergreen. 

 Stamens mostly 3; low heath -like shrubs. 



Fam. . 1. Empetraceae. 

 Stamens 4-7; herbs with broad leaves and spiked flowers. 



Fam. 2. Buxaceae. 

 ,•;.' Petals present; leaves deciduous except some Ilicaceae. 



Low annual herbs, with pinnately-divided leaves, the stamens twice 



as many as the petals. Fam. 3. Limnanthaceae. 



Trees or shrubs, rarely herbaceous vines. 

 , Ovary 1-celled; fruit a small drupe. 



Fam. 4. Anacardaceae. 

 Ovary 2-several-eelled. 



Leaves simple, pinnately veined. 



Seeds not arilled. Fam. 5. Ilicaceae. 



Seeds arilled; ovules erect; capsule fleshy. 



Fam. 6. Celastraceae. 

 Leaves simple and palmately veined, or compound. 

 , Fruit a bladdery 3-lobed capsule. 



Fam. 7. Staphyleaceae. 

 Fruit of 2-winged samaras. 



Fam. 8. Aceraceae. 

 Fruit a leathery capsule ; flowers irregular ; leaves 

 digitately compound. Fam. 9. Hippocastanaceae. 

 Flowers very irregular, the posterior sepal large, saccate; succulent herbs, 

 the capsule elastically dehiscent. Fam. 10: Balsaminaceae. 



Family 1. EMPETRACEAE Dumort. Orowberry Family. 



1. COKEMA' J Don. 



1. Corema ConraTJii Tdrr. Broom Crowberry. M. p. 598. Sandy pine- 

 - barrens. Early spring. 

 Burlington— "Tine Plains." 



