Contains 7 accepted taxa overall.
Characteristics
Classification
Citation
Gamochaeta Weddell, Chlor Andina 1: 151. 1856.
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TYPE: Gamochaeta americana (Miller) Weddell (Gnaphalium americanum Miller) Lectotypified by Cabrera, Bol. Soc. Argent. Bot. 9: 362. 1961.
Species
| Scientific Name | Common Name | Herbarium Specimens | Status | Photos |
|---|---|---|---|---|
| Gamochaeta antillana | CARIBBEAN PURPLE EVERLASTING; DELICATE EVERLASTING | Native | ||
| Gamochaeta argyrinea | SILVERY CUDWEED | Native | ||
| Gamochaeta chionesthes | WHITE-CLOAKED CUDWEED | Native | ||
| Gamochaeta impatiens | AMERICAN EVERLASTING; ELEGANT CUDWEED | Not Native | ||
| Gamochaeta pensylvanica | PENNSYLVANIA EVERLASTING; PENNSYLVANIA CUDWEED | Not Native FACU (NWPL) | ||
| Gamochaeta purpurea | SPOONLEAF PURPLE EVERLASTING; SPOONLEAF CUDWEED | Native UPL (NWPL) | ||
| Gamochaeta simplicicaulis | SINGLESTEM EVERLASTING; SIMPLE-STEM CUDWEED | Not Native |
Identification Key
1. Leaves concolor or weakly bicolor, the upper and lower surfaces equally greenish to gray-greenish and both loosely or sparsely tomentose or arachnose, sometimes subpannose
2
1. Leaves bicolor, the lower surface densely closely white-pannose to pannose-tomentose, the upper surface glabrous to sparsely arachnose
3
2. Basal and proximal leaves 2-6(10) mm wide; bracts among heads linear, oblanceolate, or oblong-oblanceolate
2. Basal and proximal leaves 4-16 mm wide; bracts among heads spatulate to oblanceolate
3. Plants (30)50-85 cm tall or long; stems erect or ascending; basal and proximal cauline leaves usually withering before flowering (clusters of smaller leaves usually present in cauline axils); apices of inner phyllaries acute-acuminate; flowering mostly late Jun-Aug
3. Plants mostly 10–50 cm tall or long; stems erect to decumbent-ascending; basal and proximal cauline leaves present or not at flowering; apices of inner phyllaries acute, obtuse, rounded, blunt, to acute-acuminate; flowering mostly Apr-Jun
4
4. Leaf upper surface glabrous or glabrate; involucres (± purplish) 2.5-3 mm long, bases glabrous; outer phyllaries elliptic-obovate to broadly ovate-elliptic, apices rounded to obtuse; bisexual florets 2-3
4. Leaf upper surface sparsely arachnose; involucres (sometimes purplish) 3-4.5(5) mm long, bases often sparsely arachnose proximally; outer phyllaries ovate, ovate-triangular, or ovate-lanceolate, apices acute to acuminate; bisexual florets 2-6
5
5. Stems not pannose (hairs usually not individually evident); involucres 3-3.5(4) mm long; apices of inner phyllaries acute to acute-acuminate; bisexual florets 2-4; cypselae purple
5. Stems usually pannose or pannose-tomentose (hairs individually evident); involucres 3-4.5 mm long; apices of inner phyllaries acute, obtuse, or truncate-rounded, sometimes apiculate; bisexual florets 3-6; cypselae tan to brownish
6
6. Cauline leaf blades oblanceolate to oblanceolate-oblong or oblanceolate-obovate; involucres 3-3.5 mm long; laminae of inner phyllaries elliptic-oblong to oblong, apices truncate-rounded or obtuse and apiculate; bisexual florets (3)4-6; usually fibrous-rooted, rarely taprooted
6. Cauline leaf blades oblanceolate to spatulate; involucres 4-4.5 mm long; laminae of inner phyllaries triangular, apices acute (not apiculate); bisexual florets 3-4; fibrous-rooted or taprooted
Genus Synonyms
| Synonym | Full Citation | Basionym | Type |
|---|---|---|---|