WILLOW FAMILY. 



331 



2. P. monilif era, Ait. Leaves broadl}^ deltoid, with spreading promi- 

 nent nerves, slightly heart-shaped or truncate at base ; scales lacerate 

 fringed, not hairj. 



IN'ecivLAce-beaiiixg Poplar. Cotton-wood. 



T)'?/??!- 40 -80 feet or more in height; the young shoots s]ight]y angled. Leaves 2 -Sinchoa 

 Jon ET, and about the same width, serrate on the margin with cartilaginous, incurved and 

 slitrhtly hairy teeth. Stirjmas nearly sessile, very large and dilated. 



Margins of streams : especially Westward. April. 



Oils. This tree has a wide rftngc, being found from the Atlantic to the 

 Pacific. This and other species are popularly known as Cotton-woods, 

 and in many regions form almost the only timber. It gets its specific 

 name from the resemblance of the long ament of ripened fruit to a string 

 of beads or necklace. Another of the Cotton-woods of the West and 

 South is P. angulata, Ait., which has its branches acutely angled or 

 winged ; both this and the preceding bear very large heart-shaped leaves, 

 7-8 inches in length on the young plants and suckers, while on the old 

 trees they are only about one quarter that size and not often heart- 

 shaped at base. 



3. P. Ge^'ca, Ait. Branches terete ; leaves cordate-ovate, acuminate, 

 obsoletely serrate, somewhat ciliate. 

 Grecian Populxjs. Athenian Poplar. 



/ff^^m 80 - 50 feet high, and 1-2 feet in diametiir, with irregular and rather spreading 

 bi'anches. Zea»cs 4- 6 or 8 inches in length, and as wide as long; petioles 1^-3 inches 

 long, laterally compressed near the leaf. "Pistillate aments 3-6 inches long. 



About houses : cultivated. Native of Greece. Fl. April. Fr. 



Obs. This species was introduced, as a shade tree, about 40 years ago ; 

 but it was not generally adopted, — and is now nearly superseded by 

 more eligible ones. We have only the pistillate plant in this country ; 



m2\ 



Fia. 280. The Cotton-wood (Populus monilif?.ra). 2-31. A fringed scale from a staminate 

 Bracnt. 232. Portion of a fertile amen . 



