482 CORNACEAE 



Conn. Throughout the state, but not very common. 



N. Y. Rare on L. I. and S. I., increasing northward, but not 



definitely known from the Catskills. 

 N. J. Local in Camden and Burlington counties, along the 



Delaware; increasing northward; not in the pine-barrens. 

 Pa. Luzerne, Northampton, Bucks, Delaware and Chester coun- 

 ties. 



Tertiary, o: Cretaceous, occasional along the Delaware in and near 

 the region of glacial terraces: Older Formations, increasing north- 

 ward. 128-220 days. Sea level-2,ioo ft. 



23. Daucus L. 



1. D. Carota L. In fields and waste places: throughout N. Am. 



Native of Europe. 



Common everywhere as a weed, less common in the pine-barrens 



than elsewhere. 



Among the occasional waifs and introduced plants are the following: The garden 

 chervil, Anthriscus cerefolium (L.) Hoffm., and a wild form A. sylvestris (L.) Hoffm., 

 known only on S. I.; the Shepherd's-needle, Scandix Pecten-veneris L.; the Poison Hem- 

 lock, Conium maculatum L.; the Parsley, Apium Petroselinum L.; The Caraway,- Carum 

 Carui L.; The Pimpernel, Pimpenella Saxifraga L.; The Goutweed, Aegopodium 

 Podagraria L.; The Fool's Parsley, Aethusa Cynapium L., The Lovage, Hipposelinum 

 Levisticum (L.) Britton; The Fennel, Foeniculum Foenicidum (L.) Karst.; The Dill- 

 weed, Anethum graveolens L.; The Coriander, Coriandrum sativum L.; The Master- 

 wort, Imperaloria Ostruthium L., known only from Long Pond, Monroe Co., Pa.; and 

 Spermolepis divaricatus (Walt.) Raf., known only from near Philadelphia. All of these 

 have been collected from time to time, but it is doubtful if any are permanently estab- 

 lished in the range. They are natives of Europe and Asia. 



CORNACEAE 



Flowers perfect, 4-parted; ovary 2-celled. 



Flowers cymose, not involucrate. 1. Cornus. 



Flowers capitate, involucrate by 4 large white bracts. 



Trees or shrubs. 2. Cynoxylon. 



Undershrubs with creeping rootstocks. 3. Chamaepericlymenum. 



Flowers polygamous or dioecious; petals minute or none; 



ovary 2-celled. 4. Nyssa. 



i. Cornus [Tourn.] L. 



Leaves opposite. 



Leaves downy pubescent beneath, at least when young. 

 Leaves broadly ovate or orbicular. 

 Leaves ovate or ovate-lanceolate. 

 Leaves glabrate or minutely pubescent beneath. 

 Leaves ovate, short-pointed; twigs purple. 

 Leaves ovate-lanceolate, acuminate; twigs grey. 

 Leaves alternate, clustered at the ends of the flowering 

 branches. 



