Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Lamiids: Gentianales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/14/23):
Asclepias tuberosa var. rolfsii
FAMILY
Apocynaceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
The flowers are typically lighter in color than those of var. tuberosa, yellow or yellowish-orange rather than deep orange to reddish. Read more in Weakley's Flora (2023).
Learn more from Vascular Plants of North Carolina.
INCLUDED WITHIN
PLANTS NATIONAL DATABASE:
Asclepias tuberosa ssp. rolfsii
FAMILY
Asclepiadaceae
INCLUDED WITHIN Floristic Synthesis of North America (Kartesz, 1999)
Asclepias tuberosa ssp. rolfsii
INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 157-01-004b:
Asclepias tuberosa ssp. rolfsii FAMILY Asclepiadaceae
SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
Asclepias rolfsii
COMMON NAME:
Sandhill Butterflyweed, Sandhill Butterfly Milkweed, Rolfs' milkweed
NameThatPlant has no pictures at this time. You might try this link: Flora of the Southeastern United States
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/14/23):
Asclepias tuberosa var. rolfsii
FAMILY
Apocynaceae
INCLUDED WITHIN
PLANTS NATIONAL DATABASE:
Asclepias tuberosa ssp. rolfsii
FAMILY
Asclepiadaceae
INCLUDED WITHIN
Floristic Synthesis of North America (Kartesz, 1999)
Asclepias tuberosa ssp. rolfsii
INCLUDED WITHIN
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 157-01-004b:
Asclepias tuberosa ssp. rolfsii
FAMILY
Asclepiadaceae
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933, 1938)
Asclepias rolfsii
If a search such as "Carex leptalea var. leptalea" doesn't deliver the results you want, try "Carex leptalea".
Or, to minimize chances of a misspelling, try just "Carex le".
Less is more: If "pencil flower" doesn't deliver the results you want, try "pencil".