. Bulletin (Pennsylvania Department of Forestry), no. 11. Forests and forestry. T PLATE CXIX. MOUNTAIN LAUREL. 1. Plowciiii^' with (i) immature Icavi-s. (mi witli (•p<-ii and dosed blossoms, X i. 3. Branch witli mature leaves and niature fruit, x ?.. .3. A fruit, enlarged. 207 MOUNTAIN LAUREL. Kalmia latifolia, Linnaeus. FAMILY AND GENUS DESCEIPTION—The Iltath family, Ericaceae, embraces species which are amongst our best known and most popular shrubs. The Huckle-berries, Blueberries, Cran-. berries, Azaleas, Kalmi^s, and Rhododendrons are some of the commo
. Bulletin (Pennsylvania Department of Forestry), no. 11. Forests and forestry. T PLATE CXIX. MOUNTAIN LAUREL. 1. Plowciiii^' with (i) immature Icavi-s. (mi witli (•p<-ii and dosed blossoms, X i. 3. Branch witli mature leaves and niature fruit, x ?.. .3. A fruit, enlarged. 207 MOUNTAIN LAUREL. Kalmia latifolia, Linnaeus. FAMILY AND GENUS DESCEIPTION—The Iltath family, Ericaceae, embraces species which are amongst our best known and most popular shrubs. The Huckle-berries, Blueberries, Cran-. berries, Azaleas, Kalmi^s, and Rhododendrons are some of the commonest representatives. Very few representatives aie of any special economic value on account of the wood which they produce. Some are important on account of their aesthetic value, while others yield valuable food or are used lu medicine. This family comprises about 90 genera with more than 1,400 species, of which number about 40 souera are found in the United States, 7 of which have tree reprefc^entatives. The flora of Pennsylvania comprises liT j^euera with at)out 4") .species. Since most of them are shrubs only 3 species ii:presentiug 3 genera are described here. The genera here described are Kalmia, Khododendron, and Oxydendrum. The genus Kalmia oonipribes 5 or (J species in North America aiul Cuba. The species descrll)e(l on this page is tlio only one vvhlch reaches tree-size. Two otiier shrub species. Sheep Laurel (Kalmia angustifolia L.) and Swamp Laurel (Kalmia polifolia Wang.), are also native to this Slate. The genus is named tifier Peter Kalm, a Swedish naturalist, who traveled in North America during the middle of the 18th century. FORM—In Pennsylvania usually a shrub 5-10 ft. in height with a stout stem which is usually forked, often inclined and bearing divergent branches which form a round compact head. In the South it reaches a height of 30-40 ft. with a diameter of 20 inches. BARK—Very thin, reddish-brown, furrowed, peels off into long, narrow, thin
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