6. Populus nigra Linnaeus, Sp. Pl. 1034. 1753; R. Parker, For. Fl. Punj. ed. 3: 510, 1956; R.R. Stewart, Ann. Cat. Vasc. Pl. W. Pak. Kashm. 181. 1972; F. Zhenfu, Z.Shidong & A.K. Skvortsov l.c. 159.
English: Lombardy Popler, Pyramidal Popler
Tree, up to 35 m tall,bark dull gray. Buds sticky. Young shoot terete, glabrous. Leaves on long shoots larger, broadly deltoid to deltoid, usually broader than long, truncate or rounded at the base, crenate, acute to acuminate. Leaves on short shoot smaller, rhombic ovate, longer than broad, cuneate at base, crenate-serrate, acuminate. Peiole 2.5-6 cm long, glabrous, lamina 5-10 (-12) x 4-8 (-15) cm. Male catkin 5-7.5 cm long; bracts brownish, 3-4 mm. Stamens (6)-15-30, anthers purple. Female catkin 5-10.5 cm. Ovary glabrous, stigmas 2, sessile, broad, obcordate. Fruiting catkin (5)-10-16 cm long. Capsule shortly stipitate, 2-valved, 5-7 x 3-4 mm.
According to R.R. Stewart (l.c.), this taxon is widely distributed in Baluchistan, the NWFP, Punjab, Dir, Chitral, Swat, Astor, Gilgit, Balti, Nubra, Ladakh and Kashmir.
Distribution: Native in China (Xinjiang), widely cultivated in Pakistan, Kashmir, China, West and Central Asia, Europe, N. Africa.
Fl. Per.: April-May.
Type: Described from temperate Europe, Herb. Linn. 1183/3 (LINN).
It is the chief source of timber in the dry inner valleys were it is irrigated up to c. 4000 m (R. R. Stewart, l.c.).
Three varieties are recognized. Our material is in conformity with var. italica (Moench) Koehne, Deut. Dendrol. 81. 1893. (Populus italica Moench, Verz. Ausländ Bäume 79. 1785).