BOTANY OF DELAWARE COUNTY. 



427 



Urtioa, Tourn. 



dioicii, L. (Com. Nettle.) 

 Laportka, Gaudich. 



Caniulensis, Gaudich. 

 PiLKA, Liudl. 



puinila, (Richweed.) 



B(KUMKUIA, JllC(l. 



cylindrica, Willd. 



UUMULUS, L. 



Lupulus, L. (Common Hop.) Rather 

 abundant along our streams. 



ORDER PLATAN.\CE^. 

 Platanus, L. 



occidentalis, L. (Buttonwood.) 



ORDER JUGLANDACE^. 



JOOLANS, L. 



cinerea, L. (White Walnut.) 

 nigra, L. (Black Walnut.) 

 Carya, Nutt. 



alba, Nutt. (Shellbark.) 

 sulcata, Nutt. (Thick Shellbark.) 

 There is a tree in Radnor, be- 

 lieved by the late John Evans to 

 be of this species, 

 tomentosa, Nutt. (Hickory.) 

 microcarpa, Nutt. (Hickory.) 

 glabra, Torr. (Pig-nut.) 

 amara, Nutt. (Bitter-nut.) 



ORDER CUPULIFER.E. 



QUERCUS, L. 



obtusiloba, Michx. (Post-oak.) 



alba, L. (White-oak.) 



Prinus, L. (Swamp Chestnut-oak.) 



montana, Willd. (Rock Chestnut- 

 oak.) 



prinoides, Willd. (Chinquapin- 

 oak.) 



Phellos, L. (Willov?-oak.) Not 

 uncommon on the clay lands 

 towards the Delaware. 



falcata, Miebx. (The true Spanish- 

 oak) on clay lands, not abund- 

 ant. 



triloba, Willd. (a variety of Q. fal- 

 cata.) 



nigra, L. (Black-Jack.) Only 

 found here on the Serpentine 

 barrens. 



tinctoria. Bartram. (Black Oak.) 



rubra, L. (Red Oak.) 



palustris, Du Roi. (Pin Oak.) 



illicifolia, Wang. (Scrub Oak.) 



coccinea, Wang. (Scarlet Oak.) 



Castanea, Tourn. 



vesca, L. (The Chestnut.) 

 Faods, Tourn. 



ferruginea. Ait. (Beech.) 

 CoRYLUS, Tourn. 



Americana, Walt. (Hazelnut.) 

 Carpinds, L. 



Americana, Michx. (Water Beech.) 

 OsTRYA, Mich. 



Virginica, Willd. (Ironwood.) 

 Found growing in Radnor by 

 the late John Evans. 



ORDER MYRICACE^. 



CoMPTONiA, Solander. 



asplenifolia. Ait. (Sweet-Fern.) 



ORDER BETULACE^. 



Betula, Tourn. 



nigra, L. (Black Birch.) Rare. 

 Alnds, Tourn. 



serrulata, Ait. (Alder-bush.) 



ORDER SALICACE^. 



Salix, Tourn. (Willow.) 



tristis. Ait. 



humilis, Marshall, 



petiolaris, Smith. 



viminalis, L. (Basket Willow.) 



alba, L. 



fragilis, L. 



nigra, Marshall. 



sericea, Marshall. 



Babt/lonica, Tourn. (Weeping 

 Willow.) 

 PoPULUs, Tourn. 



tremuloides, Michx. (Quivering 

 Aspen.) 



grandidentata. 



Grceca, Ait. (Athenian Poplar.) 



dilatata, Ait. (Lombardy Poplar.) 



alba, L. (Silver Poplar.) 



ORDER CONIFERS. 



PiNUS. 



inops, Ait. 



rigida, Mill. (Yellow pine.) 



Strobus, L. (White pine.) 



Abies, Tourn. 



Canadensis, Michx. (Banks of 

 streams. 



Jdnipercs, L. 



communis, L. (Juniper.) 

 Virginiana, L. (Red Cedar.) 



