. Concord area trees and shrubs. Botany; Trees; Shrubs. TREES ALTERNATE SIMPLE LEAVES HAWTHORNS: Thorny trees with mostly unbranched thorns Reliable identification in this group may require examination of flowers. Leaf shapes may vary considerably on the same plant. Leaf characters used below apply primarily to mature leaves of fruiting branchlets. For problem specimens consult the illustrations and key in Seymour's Flora of New England. Hawthorns in our area are found in old pastures, thickets, borders of woods and occasionally in woods. The fruits of some species are palatable and sometimes
. Concord area trees and shrubs. Botany; Trees; Shrubs. TREES ALTERNATE SIMPLE LEAVES HAWTHORNS: Thorny trees with mostly unbranched thorns Reliable identification in this group may require examination of flowers. Leaf shapes may vary considerably on the same plant. Leaf characters used below apply primarily to mature leaves of fruiting branchlets. For problem specimens consult the illustrations and key in Seymour's Flora of New England. Hawthorns in our area are found in old pastures, thickets, borders of woods and occasionally in woods. The fruits of some species are palatable and sometimes used for making jellies. SINGLE-SEED HAWTHORN Crataegus monogyna Leaves small, deeply sinused; veins running to sinuses as well as to lobes. Fruit usually with only one nutlet. Small tree, occasionally thornless, which uncommonly spreads from COCKSPUR THORN Crataegus crus-galli Leaf base narrow. Leaves essentially unlobed, mostly less than 3 cm. wide, glossy above. Fruit with 1-3 nutlets. Calyx lobes untoothed. Small tree. Uncommon. LONG-SPINED THORN Crataegus macracantha â or C. succulents var. macracantha) Leaf base narrowed. Leaves sometimes with small lobes and mostly wider than 3 cm., often glossy above. Fruit with 2-3 nutlets. Calyx lobes toothed. Small tree or stout shrub. Uncommon. SINGLE-SEED HAWTHORN COCKSPUR THORN. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Angelo, Ray, 1948-; Angelo, Ray, 1948-. Cambridge, Mass. : Concord Field Station, Museum of Comparative Zoology, Harvard University
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Keywords: ., bookcentury1900, booksubjec, booksubjectbotany, booksubjectshrubs
