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Wavy Cloak Fern,
Astrolepis sinuata ssp. sinuata
Pinnae alternate, oblong with short petioles, cut 1/3 to 1/2 way to midvein, per Field Guide to the Ferns and Other Pteridophytes of Georgia.
Pellaea ternifolia ssp. arizonica
Basal pinnae of 3 incompletely divided segments. Petiole dk purple to black, per The Ferns and Lycophytes of Texas.
Mariana Maiden Fern,
Petiole in cross section, after a day drying in the plant press.
Stem horizontal, atop or just below soil surface. Petioles often w prickles, per Forest Plants of the Southeast and Their Wildlife Uses.
Stem below ground (rarely emerging). Petioles long and 3-angled, per Forest Plants of the Southeast and Their Wildlife Uses.
Leaves fan-shaped, segments faintly corrugated; petioles 3-angled, per Forest Plants of the Southeast and Their Wildlife Uses.
Sharp spines project from petiole base, from stolons, per Forest Plants of the Southeast and Their Wildlife Uses.
Leaves are held on 3' long petioles that attach in the center of the leaf, per Invasive Plants, Guide to Identification, Impacts and Control.
Sepals become sharply recurved and extend downward between petioles, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.
Common Shagbark Hickory,
Crushed lvs w faint apple smell unlike other hickories. Petioles pubescent, per Native Trees of the Southeast, An Identification Guide.
Petioles pubescent, foliage aromatic when crushed, per Native Trees of the Southeast, An Identification Guide.
Fruit husk spines and leaf petioles are usually less than 1cm long, per Woody Plants of the Southeastern US: A Winter Guide.
Rock Chestnut Oak,
Yellow petiole 10-32mm long, per Field Guide to Native Oak Species of Eastern North America.
Dwarf Live Oak,
Leaves obovate or oblanceolate, with a very short petiole, base cuneate, per Field Guide to Native Oak Species of Eastern North America.
Twigs & petioles have long, spreading, glassily transparent hairs, per Native Trees of the Southeast, An Identification Guide.
European Stinging Nettle,
Urtica dioica ssp. dioica
Inflorescences usually surpassing the subtending leaf petiole, per Weakley's Flora.