longleaf milkweed (Asclepias longifolia)
Description
Leaves may be opposite or alternate. Most keys use opposite as a characteristic. This plant has flowers in multiple umbels. Similar to Asclepias hirtella, but A. longifolia has incurved hairs on the peduncle, and 10-30 flowers per umbel.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum: Magnoliophyta
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Class: Magnoliopsida
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Order: Gentianales
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Family: Apocynaceae
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Genus: Asclepias
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