78 



WEEDS AXD USEFUL PLANTS. 



1. E.. typhi'na, L. Young branches and petioles densely villous 

 leaflets in many pairs, acutely serrate, glaucous and somewhat pilose 

 beneath ; drupes densely pubescent. 



Typha-like Ehus. Staghorn Sumach. 



Lactescent. Stem 10-15 or 20 feet high, and sometimes 4 - 6 Inches in diameter, branched 

 Leaves composed of 8-15 or 20 pairs of lance-ohlong leaflets (2-4 inches in length) ; com- 

 mon petioles 1-2 feet long. Flowers yellowish-green, in thyrsoid panicles, — the feHile 

 panicles smaller and more compact. Ovaries clothed with a long greyish velvety pu- 

 bescence — which on the fmit becomes a bright purple, and sharply acid. 



Woodlands and banks of streams : Canada to Louisiana. 2^Z. June. i^V. September - 

 Ctotober. 



Obs. This is the largest and handsomest species of the genus — as seen 

 in the Middle States. The fine purple clusters of fruit, on the fertile 

 plant, render it quite ornamental ; and, if introduced into the yards and 

 public squares of our cities, would present an almost literal exemplifi- 

 cation of the much-admired jR (h) us in urhe ! Its roots, however, are 

 rather troublesome in sending up suckers. 



ff Young hrancJies downy-pubescent. 



2. copalli'na, L. Common petiole winged ; leaflets oblong or ovate- 

 lanceolate, nearly entire. 



Copal Rhus. Dwarf Sumach. 



.Tutce resinous. 5'te?n 3-8 feet high, branched, iea/efe 1 - 3 inches long, usually 4-10 

 pairs with a terminal one, subcoriaceous, shining above. Flowers yellowish-green in ter- 

 minal thyrsoid panicles. Fruit densely pubescent, finahy dark purple and acid. 



Dry hills, frequent. Fl July. Fr. October. 



0^5. A very neat s'pecies, with very variable leaflets, which are some- 

 times coarsely and unequally serrate. 



fft Young branches smooth. 



3. E. gla'bra, L. Branches and petioles glabrous ; leaflets in many^ 

 pairs, 'serrate, smooth on both sides, glaucous beneath. 

 Glabrous Rhus. Common or Smooth Sumach. 



Juice copiously milky. Stem 3-8 or 10 feet high, irregularly branching; young 



Fig 56. Smooth Sumach (Rhus glabra), a star linate flower. 57. A pistillate flower. 68, 

 The same divided, all much enlarged. 



