WILDFLOWERS OF NEW MEXICO

 

A crown of dense clusters of yellow flower heads cover the numerous stems forming a bushy subshrub to 4-feet tall. Note the stems and thread-like leaves are hairless, and the yellow flower heads have only 5 petal-like rays, and 8 even-sized phyllaries beneath the rays with tiny or no bractlets.


FLOWER: June–October. Flat-topped to rounded arrays with 10–20 flower heads per stem; ±5 yellow ray flowers, linear, 1/2-inch long (8–12 mm), disk flowers yellow; ±8 phyllaries, green tipped; 0–3 tiny bracklets beneath the phyllaries.


LEAVES: Alternate, same size, evenly distributed along stem. Blades green, hairless, 2–4-inches long (5–10 cm) with linear to thread-like lobes to 1/4-inch wide (6 mm).


HABITAT: Sandy, gravelly soils, grasslands, roadsides, disturbed areas; desert grasslands and scrub, shortgrass prairie, pinyon-juniper, ponderosa woodlands.


ELEVATION: 3,500–10,500 feet.


RANGE: AZ, CA, NM, NV, TX, UT, WY.


SIMILAR SPECIES: About 22 species of Senecio in NM, 2 others with thread-like leaves, both hairless. Threadleaf Grounsel, S. falccidus var. monoensis, is hariless, has ±21 phyllaries, and bracklets 1/2 the length of the phyllaries or longer. See key below.


NM COUNTIES: Nearly statewide (absent se plains) in low- to high-elevation, dry habitats: Bernalillo, Catron, Cibola, Colfax, Curry, De Baca, Dona Ana, Grant, Harding, Lincoln, Los Alamos, McKinley, Mora, Otero, Quay, Rio Arriba, Roosevelt, San Juan, San Miguel, Sandoval, Santa Fe, Sierra, Socorro, Taos, Torrance, Union, Valencia.


KEY to 3 species with thread-like leaves

1. Conspicuous bracklets 1/2 or more the length of the phyllaries ... S. falccidus var. monoensis (hairless)

(1+) tiny or no bractlets ... (2)


2. Woolly-hairy leaves ... S. flaccidus var. flaccidus

(2+) Leaves hairless or nearly so ... (3)


3. Phyllaries ±8, rays 5 … S. sparticoides

(3+) Phyllaries ±13, rays 8 … S. riddellii

BROOM  GROUNDSEL  (RAGWORT)

SENECIO  SPARTICOIDES

Aster Family, Asteraceae

Perennial herb

THE CONTENTS OF THIS WEBSITE ARE COPYRIGHTED AND CANNOT BE USED

WITHOUT PERMISSION OF GEORGE OXFORD MILLER

Narrow leaves have thread-like lobes (arrow).

No, or only tiny, brackets (arrow) are beneath the ±8 phyllaries .

Flower heads have ±5 yellow ray flowers.

HOME          SCIENTIFIC NAME          FAMILY NAME           SEARCH YELLOW          SEARCH RED          SEARCH BLUE


SEARCH WHITE         SEARCH CACTI         SEARCH LEAFLESS         GLOSSARY

RETURN

Email Me