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Pseudognaphalium
Family: Asteraceae
Pseudognaphalium image
Max Licher
  • FNA
  • Resources
Guy L. Nesom in Flora of North America (vol. 19, 20 and 21)
Annuals, biennials, or perennials (sometimes aromatic), (4-)15-150(-200) cm (usually taprooted, sometimes fibrous-rooted). Stems 1+, usually erect, sometimes decumbent to procumbent (± woolly-tomentose, sometimes stipitate- or sessile-glandular). Leaves basal and cauline or mostly cauline; alternate; usually sessile; blades mostly narrowly lanceolate to oblanceolate, bases often clasping and/or decurrent, margins entire, faces bicolor or concolor, abaxial white to gray and tomentose to velutinous, adaxial usually greenish and glabrous or glabrescent, sometimes grayish and loosely arachnose (sometimes stipitate- or sessile-glandular). Heads disciform, usually in glomerules in corymbiform or paniculiform arrays, sometimes in terminal clusters. Involucres mostly campanulate to cylindric, (3-)4-7 mm. Phyllaries in (2-)3-7(-10) series, whitish, rosy, tawny, or brownish (opaque or hyaline, dull or shiny; stereomes usually green, usually sessile-glandular distally), unequal, usually chartaceous toward tips. Receptacles flat, smooth, epaleate. Peripheral (pistillate) florets (15-)25-250+ (more numerous than bisexual); corollas yellowish. Inner (bisexual) florets (1-)5-20(-40+); corollas yellowish (red-tipped in P. luteoalbum). Cypselae oblong-compressed or cylindric, faces usually smooth, sometimes papillate-roughened and/or with 4-6 longitudinal ridges, usually glabrous (papilliform hairs in P. luteoalbum); pappi readily falling, of 10-12 distinct (coherent basally in Pseudognaphalium luteoalbum and P. stramineum), barbellate bristles in 1 series. x = 7. Fifteen of the species treated here occur also in Mexico; those that do not are Pseudognaphalium obtusifolium, P. saxicola, P. micradenium, and P. helleri (eastern United States and adjacent Canada), and P. ramosissimum and P. thermale (western United States and adjacent Canada).

Basal and proximal leaves of Pseudognaphalium species often wither before plants reach flowering. In the key and descriptions here, references to leaves are to cauline leaves of plants at flowering unless otherwise indicated.

Species within checklist: Santa Rita Experimental Range NEON (SRER) Plants - Desert Southwest (D14)
Pseudognaphalium canescens
Image of Pseudognaphalium canescens
Map not
Available
Pseudognaphalium leucocephalum
Image of Pseudognaphalium leucocephalum
Map not
Available
Pseudognaphalium pringlei
Images
not available
Map not
Available
NSF NEON | Open Data to Understand our Ecosystems The National Ecological Observatory Network is a major facility fully funded by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.