Eryngium yuccifolium var. yuccifolium (Northern Rattlesnake-master)

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APIACEAE

Eryngium yuccifolium Michaux var. yuccifolium. Common name: Northern Rattlesnake-master. Phenology: Jun-Aug. Habitat: Diabase barrens and glades, olivine barrens, pine savannas, pine flatwoods over loamy or clay soils, wet to dry prairies, other open sites with at least periodic moisture, generally in sites showing some prairie affinities. Distribution: Widespread in southeastern and midwestern North America, the exact range limits of the typic variety and var. synchaetum somewhat obscure; probably distributed from NJ, OH, s. MI, WI, MN, and NE south to Panhandle FL, AL, MS, n. LA, and e. TX.

Origin/Endemic status: Native

Synonymy ⓘ: = FNA13, K4, MC, NE, RAB, Tx, Va, Bell (1963); = Eryngium aquaticum L. — S, S13, misapplied; = n/a — Tat; < Eryngium yuccifolium Michx. — Ar, C, F, Fl7, G, GrPl, GW2, Il, Mi, Mo2, NcTx, Ok, Tn, W, WH3. Basionym: Eryngium yuccifolium Michx. 1803

Links to other floras: = Eryngium yuccifolium var. yuccifolium - FNA13

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Wetland Indicator Status:

Atlantic and Gulf Coastal Plain: FAC (taxonomic split from wetland indicator species)
Eastern Mountains and Piedmont: FAC (name change)
Great Plains: FACW (taxonomic split from wetland indicator species)
Midwest: FAC (taxonomic split from wetland indicator species)
Northcentral & Northeast: FAC (taxonomic split from wetland indicator species)

Heliophily ⓘ: 8

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Horticultural Information

Intro: Upright, stiff perennial.

Stems: Stems stout, stiff, branched above, pale green.

Leaves: Leaves alternate but mostly clustered toward base of stem, sessile, strap-like, to 40 in. long, reduced above, with parallel veins and widely spaced bristles on margins, thick and leathery, smooth.

Inforescence:

Flowers: Flowers in compact, rounded heads, about 1 in. wide, at branch tips and top of stem, each head surrounded by small, sharp-tipped bracts; greenish-white, tiny, consisting of 5 minute petals and 5 green sepals as well as tiny, sharp bractlets.

Fruits:

Comments:

Height: 2-4 ft.

plant sale text:

bloom table text:

description: Upright, stiff perennial.

stems: Stems stout, stiff, branched above, pale green.

leaves: Leaves alternate but mostly clustered toward base of stem, sessile, strap-like, to 40 in. long, reduced above, with parallel veins and widely spaced bristles on margins, thick and leathery, smooth.

inflorescence:

flowers: Flowers in compact, rounded heads, about 1 in. wide, at branch tips and top of stem, each head surrounded by small, sharp-tipped bracts; greenish-white, tiny, consisting of 5 minute petals and 5 green sepals as well as tiny, sharp bractlets.

fruits:

comments:

cultural notes:

germination code: 2

native range: southeastern & central U.S.

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Horticultural Information