Tsuga canadensis (L.) Carr. Eastern Hemlock or Canadian Hemlock
Native to north-eastern United States and Canada, cultivated in northern states and in western Europe in gardens and botanical collections, and occasionally for its timber, although of poor quality. The inner bark has been important in leather tanning. Height to about 30m (100ft). Flower open in May, males about 0.3cm (¨û in) across, greenish yellow, females slightly larger and greenish. Cones are 1.2-2.5cm (¨ö-1in) long, ripening from green to brown in October. Leaves are in rows on either side of the shoot with an extra row along the top flattened to the shoot and with the white underside uppermost, a useful feature for recognition. Zone 4