Howell’s pussytoes

(Antennaria howellii ssp. neodioica)

Conservation Status
Howell’s pussytoes (ssp. neodioica)
Photo by Luciearl
  IUCN Red List

not listed

     
  NatureServe

N5 - Secure

SNR - Unranked

     
  Minnesota

not listed

     
           
           
           
 
Description
 
 

Howell’s pussytoes (ssp. neodioica) is an evergreen woolly wildflower. It occurs in the United States from Maine to New Jersey west to Washington and Oregon, and in Canada from coast to coast north to the Northwest Territories. It is common in Minnesota. It is found in prairies, fields, pastures, woodland openings, rocky slopes, and dry shores. It grows under full sun in dry to moderately moist sandy soil.

Howell’s pussytoes (ssp. neodioica) is an erect, 6 to 13¾ (15 to 35 cm) tall, perennial forb that rises on a rosette of basal leaves and a flowering stem from fibrous roots. It spreads by producing above ground runners (stolons). The stolons are leafy, densely woolly, slender, and usually 1¼ to 3 (3 to 8 cm) long, sometimes longer. They root at the nodes, often forming colonies. The leaves along the stolons are similar to and almost as large as the basal leaves.

Basal leaves are 916 to 1 (14 to 48 mm) long, and to ¾ (2.5 to 20.0 mm) wide. The leaf blades are spatula-shaped to narrowly or broadly egg-shaped. They narrow at the base to a well-defined stalk (petiole), are pointed or rounded at the tip, and have an abrupt, short, sharp point at the tip (mucronate). There is usually just a single vein extending from the base to the tip. Sometimes there is also a pair of obscure partial veins that can best be seen on the underside. The lower surface is densely covered with white, short, matted or tangled, soft, woolly hairs. On new leaves the upper surface may be grayish-green with sparse, long, gray hairs, or bright green and almost hairless. In either case, the upper surface soon becomes hairless. The margins are untoothed. Basal leaves are often evergreen.

A flowering stem arises from the stolon of the previous year’s growth. The stem is erect, sparsely leafy, and densely covered with white woolly hairs. Stem leaves are much smaller than basal leaves. They are alternate, unstalked, linear to narrowly lance-shaped, narrowly pointed at the tip, and 3 16 to 1¾ (8 to 35 mm) long. There is a pointed, bristle-like extension (arista) on the middle and upper leaves, and a short, flat or inrolled, papery extension (flag) at the tip of only the leaves near the inflorescence. Middle and other upper stem leaves are not flagged. The upper and lower surfaces are densely covered with white woolly hairs.

The inflorescence is a tight, round-topped cluster (corymb) of usually 4 to 8, sometimes more, narrow flower heads at the end of the stem. Male and female flowers are borne on separate plants. Male plants are very uncommon. When no male plants are present, fertilization of the ovule does not take place and only female plants are produced (parthenogenesis). This results in some populations being composed entirely of female plants.

The whorl of 3 to 6 or more bracts (involucre) subtending each flower head on male (staminate) plants is ¼ (6 mm) long. The involucre on female (pistillate) plants is ¼ to (6 to 9 mm) long. The bracts of the involucre (phyllaries) are narrow, green or reddish at the base, and white or cream-colored at the tip. The outer bracts are loosely covered with woolly hairs. The flower heads have 20 to 100 white or pinkish, tubular disk florets and no ray florets. Staminate florets are (3.5 mm) long. Pistillate florets are to ¼ (3.5 to 6.0 mm) long. Staminate plants have numerous columns of stamens protruding above the flower head.

The fruit is an elliptic to egg-shaped, 132 to 116 (0.9 to 1.5 mm) long, one-seeded capsule (cypsela). It is hairless and minutely bumpy (pappilate), and there is a tuft of hairs (pappus) at the tip. On staminate plants the pappus is (4 mm) long, on pistillate plants it is 316 to ¼ (5.5 to 7.0 mm) long.

 
     
 

Height

 
 

6 to 13¾ (15 to 35 cm)

 
     
 

Flower Color

 
 

White to pinkish

 
     
 

Similar Species

 
 

Canadian pussytoes (Antennaria howellii ssp. canadensis) basal leaves have just one vien, and are green and hairless on the upper side.

Howell’s pussytoes (Antennaria howellii ssp. petaloidea) stolon leaves are smaller than the basal leaves. The basal leaves do not have distinct petioles. All of the middle and upper leaves are flagged.

 
     
 
Habitat
 
 

Dry to moderate moisture. Prairies, fields, pastures, woodland openings, rocky slopes, and dry shores. Full sun. Sandy soil.

 
     
 
Biology
 
 

Flowering

 
 

Mid-spring to early summer

 
     
 

Pests and Diseases

 
 

 

 
     
 
Use
 
 

 

 
     
 
Distribution
 
 

Distribution Map

 

Sources

4, 7, 24, 28, 29, 30.

 
  6/21/2022      
         
 

Nativity

 
 

Native

 
         
 

Occurrence

 
 

 

 
         
 
Taxonomy
 
  Kingdom Plantae (green algae and land plants)  
  Subkingdom Viridiplantae (green plants)  
  Infrakingdom Streptophyta (land plants and green algae)  
  Superdivision Embryophyta (land plants)  
  Division Tracheophyta (vascular plants)  
  Subdivision Spermatophytina (seed plants)  
  Class Magnoliopsida (flowering plants)  
  Superorder Asteranae  
 

Order

Asterales (sunflowers, bellflowers, fanflowers, and allies)  
 

Family

Asteraceae (sunflowers, daisies, asters, and allies)  
  Subfamily Asteroideae  
  Supertribe Asterodae  
  Tribe Gnaphalieae (paper daisies)  
  Genus Antennaria (pussytoes)  
  Species Howell’s pussytoes (Antennaria howellii)  
       
 

Synonyms

 
 

Antennaria grandis

Antennaria neglecta var. neodioica

Antennaria neglecta var. attenuata

Antennaria neodioica

Antennaria neodioica var. attenuata

Antennaria neodioica var. chlorophylla

Antennaria neodioica var. grandis

Antennaria neodioica var. interjecta

Antennaria neodioica var. rupicola

Antennaria obovata

Antennaria rhodantha

Antennaria rupicola

Antennaria russellii

 
       
 

Common Names

 
 

Howell’s pussytoes

small pussytoes

 

 

 

 

 

 

 

Glossary

Corymb

A flat-topped or convex inflorescence in which the stalked flowers grow upward from various points on the main stem to approximately the same horizontal plane. The outer flowers open first.

 

Cypsela

A dry, one-chambered, single-seeded seed capsule, formed from a single carpel, with the seed attached to the membranous outer layer (wall) only by the seed stalk; the wall, formed from the wall of the inferior ovary and also from other tissues derived from the receptacle or hypanthium, does not split open at maturity, but relies on decay or predation to release the contents.

 

Involucre

A whorl of bracts beneath or surrounding a flower or flower cluster.

 

Linear

Long, straight, and narrow, with more or less parallel sides, like a blade of grass.

 

Mucronate

Tipped with a short, sharp, abrupt point.

 

Node

The small swelling of the stem from which one or more leaves, branches, or buds originate.

 

Papilla

A tiny, rounded, nipple-like projection on the surface of a leaf or petal.

 

Pappus

The modified calyx composed of awns, scales, bristles, or feather-like hairs in plants of the Asteraceae family.

 

Petiole

On plants: The stalk of a leaf blade or a compound leaf that attaches it to the stem. On ants and wasps: The constricted first one or two segments of the rear part of the body.

 

Phyllary

An individual bract within the involucre of a plant in the Asteraceae family.

 

Pistillate

Referring to a flower that has a female reproductive organ (pistil) but does not have male reproductive organs (stamens).

 

Staminate

Referring to a flower that has a male reproductive organs (stamens) but does not have a female reproductive organ (pistil).

 

Stolon

An above-ground, creeping stem that grows along the ground and produces roots and sometimes new plants at its nodes. A runner.

 

 

 

 
 
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Luciearl

 
    Howell’s pussytoes (ssp. neodioica)   Howell’s pussytoes (ssp. neodioica)  
           
    Howell’s pussytoes (ssp. neodioica)   Howell’s pussytoes (ssp. neodioica)  
           
 
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  Luciearl
6/7/2022

Location: Lake Shore, MN

Howell’s pussytoes (ssp. neodioica)

 
           
 
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Created: 6/21/2022

Last Updated:

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