OF THE CAROLINAS & GEORGIA

Lycophytes: Isoetales

WEAKLEY'S FLORA (4/24/22):
Isoetes melanopoda ssp. silvatica   FAMILY Isoetaceae   NEW! Click to go to FSUS key


INCLUDED WITHIN PLANTS NATIONAL DATABASE:
Isoetes melanopoda   FAMILY Isoetaceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Isoetes melanopoda ssp. silvatica

INCLUDED WITHIN Flora of North America
Isoetes melanopoda

INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 005-01-001:
Isoetes melanopoda   FAMILY Isoetaceae

INCLUDED WITHIN Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Isoetes melanopoda

 

COMMON NAME:
Eastern Blackfoot Quillwort


         To see larger pictures, click or hover over the thumbnails.

image of Isoetes melanopoda ssp. silvatica, Eastern Blackfoot Quillwort

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_isme_001_lvd

        

image of Isoetes melanopoda ssp. silvatica, Eastern Blackfoot Quillwort

Peter Schafran    psc_silv1

April    Rowan County    NC

Eagle Point

image of Isoetes melanopoda ssp. silvatica, Eastern Blackfoot Quillwort

Peter Schafran    psc_silv1b

April    Rowan County    NC

Eagle Point

The presence of a shiny black leaf base is of limited diagnostic value, per Synopsis of Isoetes in the Southeastern United States. Castanea (Boom, 1982).

image of Isoetes melanopoda ssp. silvatica, Eastern Blackfoot Quillwort

Bruce A. Sorrie    bas_isoetes_melanopoda1

May    Union County    NC

image of Isoetes melanopoda ssp. silvatica, Eastern Blackfoot Quillwort

Bruce A. Sorrie    bas_isoetes_melanopoda3

May    Union County    NC

image of Isoetes melanopoda ssp. silvatica, Eastern Blackfoot Quillwort

Peter Schafran    psc_silv2

June    Dinwiddie County    VA

Scanning electron micrograph of megaspore proximal surface at 100X

Megaspores of I. melanopoda are small, generally 300-400 micra in diameter, per Synopsis of Isoetes in the Southeastern United States. Castanea (Boom, 1982).

image of Isoetes melanopoda ssp. silvatica, Eastern Blackfoot Quillwort

Peter Schafran    psc_silv3

June    Dinwiddie County    VA

Scanning electron micrograph of megaspore distal surface and girdle at 100X

image of Isoetes melanopoda ssp. silvatica, Eastern Blackfoot Quillwort

Patrick D. McMillan    pdmimelanopoda_far1

Month Unknown    Lancaster County    SC

Forty Acre Rock Heritage Preserve

Leaves of Isoetes are linear-subulate, dilated at base, subterete, hollow, per Vascular Flora of the Carolinas.

image of Isoetes melanopoda ssp. silvatica, Eastern Blackfoot Quillwort

Patrick D. McMillan    pdmimelanopoda_far2

Month Unknown    Lancaster County    SC

Forty Acre Rock Heritage Preserve

In spite of their dark spores, Forty Acre Rock's plants are not I. melanospora.

 

WEAKLEY'S FLORA (4/24/22):
Isoetes melanopoda ssp. silvatica   FAMILY Isoetaceae

INCLUDED WITHIN PLANTS NATIONAL DATABASE:
Isoetes melanopoda   FAMILY Isoetaceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Isoetes melanopoda ssp. silvatica

INCLUDED WITHIN Flora of North America
Isoetes melanopoda

INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 005-01-001:
Isoetes melanopoda   FAMILY Isoetaceae

INCLUDED WITHIN Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Isoetes melanopoda

 

Find by SCIENTIFIC NAME:

2652

Fern/Fern ally
Perennial

Native to the Carolinas & Georgia

Rare (an endemic)

Habitat: Clay soils in low woods, seeps on sandstone or granitic rocks, in NJ in clay-based depressions on Cape May, per Weakley's Flora

map
NEW! Click here to see a map from Weakley's Flora of the Southeastern US showing range and abundance.

Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)

LEAVES:
Deciduous
Simple
Leaves whorled, at least at maturity

FRUIT:
Spring/Summer/Fall

 

TO LEARN MORE about this plant, look it up in a good book!



 


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