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Acaena pallida

Higher Taxonomy
Family: RosaceaeView DescriptionDichotomous Key

Common Name: ROSE FAMILY
Habit: Annual to tree, glandular or not. Leaf: simple to palmately or pinnately compound, generally alternate; stipules free to fused (0), persistent to deciduous. Inflorescence: cyme, raceme, panicle, cluster, or flowers 1; bractlets on pedicel ("pedicel bractlets") generally 0--3(many), subtended by bract or generally not. Flower: generally bisexual, radial; hypanthium free or fused to ovary, saucer- to funnel-shaped, subtending bractlets ("hypanthium bractlets") 0--5, alternate sepals; sepals generally 5; petals generally 5, free; stamens (0,1)5--many, anther pollen sacs generally 2; pistils (0)1--many, simple or compound, ovary superior to inferior, styles 1--5. Fruit: 1--many per flower, achene (fleshy-coated or not), follicle, drupe, or pome with generally papery core, occasionally drupe-like with 1--5 stones. Seed: generally 1--5 (per fruit, not per flower).
Genera In Family: 110 genera, +- 3000 species: worldwide, especially temperate; many cultivated for ornamental, fruit, especially Cotoneaster, Fragaria, Malus, Prunus, Pyracantha, Rosa, Rubus. Note: Number of teeth is per leaf or leaflet, not per side of leaf or leaflet, except in Drymocallis.
eFlora Treatment Author: Daniel Potter & Barbara Ertter, family description, key to genera; treatment of genera by Daniel Potter, except as noted
Scientific Editor: Daniel Potter, Thomas J. Rosatti.
Genus: AcaenaView DescriptionDichotomous Key

Habit: Perennial herb, nonglandular. Leaf: generally +- basal, odd-1-pinnate; leaflets +- evenly toothed to lobed. Inflorescence: dense spike or head; pedicel bractlets 0. Flower: hypanthium +- obconic, bractlets leaf-like to linear; sepals generally 4; petals 0; stamens 2 or 4, opposite sepals; pistils 1(2), ovary superior, continuous to style at top, stigma many-branched, exserted from hypanthium. Fruit: hypanthium +- hardened, encasing elliptic achenes; prickles generally 4--many, generally barbed.
Species In Genus: +- 45 species: especially southern hemisphere. Etymology: (Greek: thorn, from fruit)
eFlora Treatment Author: B.H. Macmillan & Barbara Ertter

Acaena pallida (Kirk) Allan
NATURALIZED
Stem: 12--15 cm, 2--3 mm diam. Leaf: 3--12 cm; stipules leaflet-like; leaflets 4--7 per side, 6--30 mm, elliptic-oblanceolate, evenly toothed < 1/4 to midvein, shiny, wrinkled adaxially, pale with uneven wax layer abaxially. Inflorescence: head, +- 10 mm diam, 20--40 mm in fruit. Flower: sepals +- 2 mm, elliptic-ovate, stamens 2, pale. Fruit: hypanthium body 4--6 mm, obtriangular; prickles 4, +- on top, longest 9--15 mm, generally a few vestigial below.
Ecology: Coastal sand, +- disturbed areas; Elevation: +- 0 m. Bioregional Distribution: CCo (Stinson Beach, Marin Co.); Distribution Outside California: native to Australia, New Zealand. Flowering Time: Mar--May
eFlora Treatment Author: B.H. Macmillan & Barbara Ertter
Jepson Online Interchange
Noxious Weed

Previous taxon: Acaena novae-zelandiae
Next taxon: Acaena pinnatifida var. californica

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Citation for this treatment: B.H. Macmillan & Barbara Ertter 2016. Acaena pallida, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=79220, accessed on February 10, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 10, 2016.


Geographic subdivisions for Acaena pallida:
CCo (Stinson Beach, Marin Co.);
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.