| 单词 | Crataegus |
| 例句 | So few species of this lovely small tree seem to do well in heat and humidity, but here the old, sinewy Crataegus marshallii was stretching to a gap in the canopy. Perspective | How the National Arboretum got its ferns and became a civic treasure 2019-10-28T04:00:00Z In the same rose family with apples, plums, cherries, and service-berries is listed the genus Crataegus, a shrubby race of trees, undersized as a rule, with stiff, zigzag branches set with thorns. Trees Worth Knowing 2011-10-13T02:00:48.357Z The Washington thorn, Crataegus phaenopyrum Med., is a smaller tree, with bright red fruit, but its broad leaves are smooth and bright green. Forest Trees of Illinois How to Know Them 2011-10-08T02:00:23.997Z Common Hawthorn; White Thorn; Scarlet-fruited Thorn; Red Haw; Mayflower Crataegus coccinea Flowers—White, rarely pinkish, usually less than 1 in. across, numerous, in terminal corymbs. Wild Flowers Worth Knowing The dotted hawthorn, Crataegus punctata Jacq., also has wedge-shaped leaves but they are leathery, dull gray-green in color with conspicuous veins. Forest Trees of Illinois How to Know Them 2011-10-08T02:00:23.997Z The pear-thorn, Crataegus calpodendron Med., is a smaller tree, with broader leaves, very few thorns and pear-shaped fruit. Forest Trees of Illinois How to Know Them 2011-10-08T02:00:23.997Z In the southern half of Illinois, growing on moist river bottoms, the green haw, Crataegus viridis L., becomes a tree 20 feet tall. Forest Trees of Illinois How to Know Them 2011-10-08T02:00:23.997Z |
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