Illinois Natural History Survey - University of Illinois

Equisetum x mackaii
Horsetail
Taxonomy

Synonyms: Equisetum variegatum schleich. var. jesupi a. a. eaton, Equisetum x trachyodon

Subspecific taxa:

Classification:

Other taxonomic & nomenclature sources: USDA PlantsITISThe Plant ListIPNI

Species Distribution
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County Map Legend
Absent:
Not known from county
Medium confidence:
Medium or unknown confidence;
often old records or unverifiable observations
Medium-high confidence:
Often observations by expert botanists
High confidence:
Often vouchered herbarium records
Planted / introduced:
Native species introduced outside historic range,
or only in planted locations within county (e.g., restorations)
Historic / extirpated:
Only historic records for the species; likely extirpated
(Note that this category is not yet functional)

North American distribution maps for this species: FLNAUSDA PlantsBONAPBISON

Collection & Observation Phenology [?]

J
0
F
0
M
0
A
0
M
0
J
0
J
0
A
0
S
0
O
0
N
0
D
0

Collection & Observation Timeline [?]

Species Status

Status/Listing: No Information

Notes:

Origin: Native

Species Description

General: Fern-allies, perennial

Roots: adventitious, fibrous, rhizomes

Shoots: whorled leaf arrangment; simple leaf type; hastate leaf shape

Inflorescence: no

Flowers: unisexual, dioecious

Fruit: no

Physiology: autotrophic; C3 C02 fixation

Ecology & Natural History

Habitat:

ILPIN Notes: Stems are evergreen. Stems are evergreen, unbranched; leaves are reduced to a whorl of scales with persistent teeth. This is considered a hybrid between E. variegatum and E. hyemale.

Functional Relationships:

Human Relationships:

  • Edibility [?] :
  • Showy Flowers:

Wildlife and Livestock Information:

  • Food Value:
  • Cover Value:

Coefficient of Conservatism (C-value) [?] :

  • Entire State: 10
  • Chicago Area: 10

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