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Allium stellatum Fraser ex Ker Gawl.

Prairie onion, autumn onion

Prairie onion is native to North American prairies.

Plants: 1–1½′ (30–45 cm) high, growing in sandy soil. Like all members of this genus, plants have a distinct onion/garlic odor.

Leaves: Leaves are few, grasslike, near the base. They die back when the flower stalks grow. Bulbs are oval or cone-shaped, ⅛ ⨉ ½″ (4 mm ⨉ 1.5 cm) in size.

Flowers: Rose-pink to lavender, in umbels that are ball-shaped, 2–3″ (5–7.6 cm) around. Each individual flower is about ¼″ (6.3 mm) in size, with 3 petals and 3 sepals. Sometimes the flowerhead is tipped over—”nodding”—making these plants resemble nodding onion (Allium cernuum).

Fruits: Chambered capsules about ⅛″ (3.2 mm) across. Each chamber contains a single black seed with a dull coat.

Habitats: Rocky, sandy soil; limestone glades, bluff ledges, and prairies.

Edibility: Bulbs are edible, but very strong in flavor, and can be eaten when boiled. The leaves are edible, either raw or cooked, and the flowers made a good garnish on salads.

Online References:

Illinois Wildflowers

The Lady Bird Johnson Wildflower Center

The USDA Plants Database

Plants for a Future

 

Allium stellatum (prairie onion, autumn onion)

5/15/2010 · Garden in the Woods, Framingham, Mass­a­chu­setts · ≈ 2 × 1′ (62 × 41 cm)

KingdomPlantaePlants, but not fungi, lichens, or algae (from Stearn's Botanical Latin)
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassLiliopsidaMonocots (plants with a single seed leaf); includes the lily family
SubclassLiliidaeIncludes lilies, orchids, and many others
OrderAsparagalesA diverse group that includes asparagus
FamilyAmaryllidaceaeAmaryllis family—plants that grow from bulbs. Includes onions and many others
GenusAlliumOnions, leeks, shallots, garlic, scallions, etc.
SpeciesstellatumStarry, star-like, with spreading leaves or petals arranged in a star-shaped fashion

About plant names...

Range: Zones 3-8:

About this map...

Allium stellatum description by Thomas H. Kent, not updated.

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