Nyssaceae – Sour Gum Family

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NYSSACEAE – SOUR GUM FAMILY Plant: shrubs or mostly trees Stem: Root: Leaves: simple, alternate; no stipules Flowers: perfect, some imperfect; 5 sepals (often reduced) or none; 5 petals (sometimes more or none); 5-10, rarely 12 stamens in 2 series; ovary inferior, 6-10 carpels Fruit: drupe or stone (1-6 seeds) Other: often included in the Cornaceae (Dogwood Family); Dicotyledons Group Genera: Nyssa (sour gum) – some workers put these in the Cornaceae family. WARNING – family descriptions are only a layman’s guide and should not be used as definitive NYSSACEAE – SOUR GUM FAMILY Water Tupelo or Tupelo Gum; Nyssa aquatic L. Black Gum [Sour Gum]; Nyssa sylvatica Marsh. Water Tupelo or Tupelo Gum USDA Nyssa aquatic L. Nyssaceae (Sour Gum Family) USDA Otter Slough area, Stoddard County, Missouri Notes: tree; dioecious; staminate flowers in clusters and pistillate flower solitary, 5 petals; leaves fairly large, alternate, simple, mostly ovate and entire or with 1 to few coarse teeth, short tip but fairly sharp, shiny dark green above, paler and finely hairy below; bark thin and grooved, base is quite swollen; twigs chambered with white pith; fruit a blue-black berry (green early) with white spots at maturity; spring to early summer [V Max Brown, 2017] Black-Gum [Sour Gum] USDA Nyssa sylvatica Marsh. Nyssaceae (Sour Gum Family) Oak Openings Metropark, Lucas County, Ohio Notes: tree; flowers greenish (dioecious); leaves alternate, mostly entire but a few teeth may be present, short tip but fairly sharp, shiny dark green above, paler and mostly smooth below; bark checkered, often deeply, in swamps base is swollen; twigs chambered with white pith, bends without breaking; buds brown with several scales; fruit a blue-black berry (1-3 on pedicel); spring to early summer [V Max Brown, 2005].

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