Dig deeper at SERNEC, a consortium of southeastern herbaria.
Unlike all but N. roanensis, this species features a long spike-like inflorescence. Read more at Vascular Plants of North Carolina.
Check out Jim Fowler's blog describing an October trip to NC's Green Swamp with Carolina Grass-of-Parnassus, Slender Rattlesnake-root, Long-lipped Ladies’-tresses orchid, and Pine Barren Gentian in glorious bloom.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA (10/20/20):
Nabalus autumnalis
FAMILY
Asteraceae_
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Prenanthes autumnalis
FAMILY
Asteraceae_
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-06-001:
Prenanthes autumnalis
FAMILY
Asteraceae_
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933)
Nabalus virgatus
COMMON NAME:
Slender Rattlesnake-root, One-sided Rattlesnake-root
Click or hover over the thumbnails to see larger pictures.
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USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_navi3_001_lvd
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Rob Hunnings rlh_grswamp_20131025d
October Brunswick County NC
Green Swamp
The inflorescence may occupy half or more of the plant's height of 2-4', per Vascular Plants of North Carolina.
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Rob Hunnings rlh_nik5_11418
October Brunswick County NC
Green Swamp
Its narrow spikelike panicle distinguishes it from other Prenanthes, per Guide to the Wildflowers of SC.
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Rob Hunnings rlh_nik5_11418b
October Brunswick County NC
Green Swamp
Inflorescences narrow and elongate (virgate); flowers pink to purple, per Weakley's Flora (2020).
)
Rob Hunnings rlh_nik5_11418c
October Brunswick County NC
Green Swamp
Phyllaries 7-8, pink or purple, linear to elliptic, 8-13mm, glabrous, per Flora of North America.
COMPARE
involucral bracts of Rattlesnake-root