Senecio species

 DSC1387

Dwarf Mountain Ragwort (Senecio fremontii var. blitoides) 

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Scientific Name Senecio amplectens var. amplectens USDA PLANTS Symbol
SEAMA
Common Name Showy Alpine Ragwort ITIS Taxonomic Serial No.
530298
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Subalpine and alpine; forest openings, rocky areas, talus slopes.
Plant: Erect perennial 16 to 24 inches tall, stout, hairless stems, singly or in clusters.
Leaves: Large basal and stem leaves, lanceolate to oblanceolate, up to 8 inches long. Basal leaves with long petioles (stalks), stem leaves without; edges may have irregular teeth.
Inflorescence: Large composite flower heads up to 3 inches across in clusters of 1 to 5 nodding heads. About 13 narrow, yellow ray flowers (petals), darker yellow-to-brown florets in dome-shaped disk. Pointed green phyllaries below may have dark tips.
References: Descr. adapted from www.americansouthwest.net
Colorado Status
Native
Scientific Name Senecio amplectens var. holmii USDA PLANTS Symbol
SEAMH
Common Name Holm's Ragwort, Holm's Groundsel ITIS Taxonomic Serial No.
530299
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Subalpine and alpine; meadows, rocky areas above timberline.
Plant: Short, erect perennial 4 to 8 inches tall; smooth stems, singly or clusters, reddish-purple.
Leaves: Mostly basal leaves, smooth, hairless, oblanceolate; smaller stem leaves, if any; edges may have irregular teeth; reddish-purple edges, veins, and stalks.
Inflorescence: Nodding composite flower heads with about 13 narrow, yellow ray flowers (petals) and numerous yellow disk florets; smooth green or deep reddish-purple phyllaries.
References: Descr. adapted from www.americansouthwest.net and SEINet.
Colorado Status
Native
Scientific Name Senecio atratus USDA PLANTS Symbol
SEAT
Common Name Tall Black-tip Ragwort ITIS Taxonomic Serial No.
36101
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Subalpine and alpine; roadsides, along trails, rocky areas.
Plant: Erect perennial 14 to 30 inches tall, single or multiple stout, hairy, ribbed stems, in clumps.
Leaves: Hairy, lanceolate with pointed tips and toothed edges, up to 10 inches long. Basal leaves angled upward, stem leaves are alternate.
Inflorescence: Small composite flower heads about 1/2-inch across in large clusters of 20 to 60 heads. About 5 thin yellow ray flowers (petals), 10 to 12 orange disk florets. Light green phyllaries below with black tips.
References: Descr. adapted from www.americansouthwest.net
Colorado Status
Native
Scientific Name Senecio bigelovii USDA PLANTS Symbol
SEBI2
Common Name Nodding Ragwort, Rayless Senecio ITIS Taxonomic Serial No.
36103
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Montane and subalpine; moist areas on hillsides, meadows.
Plant: Erect perennial 16 to 32 inches tall, single or a few stems, may have long hairs.
Leaves: Lanceolate, toothed edges, 3 to 6 inches long near base; alternate and much smaller and stalkless upward.
Inflorescence: Small, nodding, composite flower heads about 1/2-inch across in clusters of 2 to 12 heads, each with many yellow disk florets enclosed by phyllaries, green early and becoming dark purple later in the season; no ray florets (petals).
References: Descr. adapted from www.americansouthwest.net and SEINet.
Colorado Status
Native
Scientific Name Senecio eremophilus var. kingii USDA PLANTS Symbol
SEERK
Common Name King’s Ragwort, Cutleaf Groundsel, Western Golden Groundsel ITIS Taxonomic Serial No.
530308
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Montane and subalpine. Disturbed areas, open areas.
Plant: Erect, branched perennial 16 to 32 inches tall, smooth stems.
Leaves: Gray-green basal and stem leaves, ovate to lanceolate outlines, deeply-incised, with toothed edges, hairless.
Inflorescence: Composite flower heads about an inch across in clusters of 20 to 60 heads, each with about 8 widely-spaced ray florets (petals), some usually missing, and many darker yellow disk florets. Kingii has black-tipped phyllaries.
References: Descr. adapted from SEINet and others.
Colorado Status
Native
Scientific Name Senecio fremontii var. blitoides USDA PLANTS Symbol
SEFRB
Common Name Dwarf Mountain Ragwort ITIS Taxonomic Serial No.
530315
Family Asteraceae (Sunflower) efloras.org
Reference
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Description Life zones and habitat: Subalpine and alpine; rocky areas, talus, crevices, outcrops.
Plant: Short perennial up to 12 inches tall, multiple, leafy stems.
Leaves: Ovate, thick-stem leaves, 1-1/2 to 2-1/2 inches long, and coarsely-toothed edges; edges and teeth may be purple-tinged.
Inflorescence: Composite flower heads about 1-1/2 inch across in small clusters (1 to 4 heads), each with 8 to 15 yellow ray florets around the central yellow/brown disk florets. Buds are purplish.
References: Descr. adapted from www.americansouthwest.net and www.efloras.org.
Colorado Status
Native
Scientific Name Senecio pudicus USDA PLANTS Symbol
SEPU3
Common Name Bashful Ragwort ITIS Taxonomic Serial No.
36172
Family Asteraceae (Sunflower) efloras.org
Reference
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Description Life zones and habitat: Subalpine to alpine. Rocky, damp or drying hillsides, roadsides, woodlands.
Plant: Erect perennial or biennial, 20 to 30 inches tall; single smooth stems, sometimes in clusters.
Leaves: Stem leaves to 6 inches long, becoming smaller upward; narrow, lanceolate, with petioles.
Inflorescence: Rayless nodding flower heads less than 1 inch long and 3/8-inch across in loose, open clusters of 8 to 15 heads; each with about 8 or more green phyllaries surrounding yellow disk florets.
References: Descr. adapted from www.efloras.org. Initially mis-identified as S. bigelovii. Thanks to Jane Hendrix of Breckenridge for providing the correct ID.
Colorado Status
Native
Scientific Name Senecio soldanella USDA PLANTS Symbol
SESO
Common Name Colorado Ragwort ITIS Taxonomic Serial No.
36183
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Alpine. Talus, tundra, rocky areas.
Plant: Short perennial 3 to 5 inches tall, succulent-looking, may have purplish stems.
Leaves: Mostly basal, green or purplish, ovate-to-round, 3/4 to 1-3/4 inch long, with long petioles; edges may have small teeth.
Inflorescence: Single, composite flower heads about an inch across, with about 13 short yellow ray florets (petals); relatively large center with many darker yellow disk florets.
References: Descr. adapted from SEINet and others.
Colorado Status
Native
Scientific Name Senecio triangularis USDA PLANTS Symbol
SETR
Common Name Arrowleaf Groundsel, Arrowleaf Ragwort ITIS Taxonomic Serial No.
36090
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Montane and subalpine. Moist areas in meadows, along streams and ponds.
Plant: Perennial 2 to 4 feet tall, stout, leafy stems.
Leaves: Alternate, triangular-shaped, about 4 inches long; coarsely-toothed edges.
Inflorescence: Composite flower heads about an inch across in clusters of 10 to 30, each with about 8 narrow yellow ray florets (petals); relatively small center with darker yellow disk florets; green, smooth phyllaries below.
References: Descr. adapted from "Guide to Colorado Wildflowers" by G.K. Guennel and SEINet.
Colorado Status
Native
Scientific Name Senecio wootonii USDA PLANTS Symbol
SEWO
Common Name Wooton's Ragwort ITIS Taxonomic Serial No.
36196
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Montane and subalpine. Dryer areas in rocky, moderately disturbed sites and coniferous forests.
Plant: Perennial up to 20 inches tall; single to several stems.
Leaves: Obovate or oblanceolate, green to light-green, prominent center vein, smooth or toothed edges. Basal leaves about 4 inches long on long, winged petioles; stem leaves fewer, much shorter and alternate.
Inflorescence: Clusters of 8 to 24 or more blossoms in corymb arrays; each about an inch across with 8 to 10 narrow yellow ray florets (petals); center with darker yellow disk florets.
References: Descr. adapted from SEINet.
Colorado Status
Native
© Tom Lebsack 2017