Jepson eFlora: Taxon page
Key to families | Table of families and genera
Previous taxon Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Next taxon
Drymocallis hansenii

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: DrymocallisView DescriptionDichotomous Key

Habit: Perennial herb, hairs short, simple, nonglandular and/or long, cross-walled, glandular. Stem: +- erect, from +- branched caudex or rhizomes. Leaf: basal and cauline, alternate, odd-1-pinnately compound; leaflets toothed, terminal generally >= lateral. Inflorescence: cyme, +- open; pedicels straight, bractlets 0. Flower: hypanthium +- shallow, bractlets 5; sepals +- triangular; petals < to > sepals, white to yellow; stamens generally 20--25, pollen sac 1, horseshoe-shaped; pistils many, styles fusiform, attached below fruit middle. Fruit: achene, glabrous. Chromosomes: n=7.
Species In Genus: 30 species: northern temperate. Etymology: (Greek: wood beauty) Note: Recognition based on morphological, molecular evidence. Drymocallis ashlandica (Green) Rydb. (inflorescence narrow, petioles glandular, petals yellow) in southwestern Oregon, possibly northwestern California.
Unabridged Note: Convergence of morphological, molecular evidence mandates recognition of Drymocallis; infrageneric taxonomy provisional. Key characters include relative proportions of 2 hair types: short simple nonglandular hairs and longer cross-walled glandular hairs.
eFlora Treatment Author: Barbara Ertter

Drymocallis hansenii (Greene) Rydb.
Stem: generally 1, 30--90 cm, glandular hairs abundant at base. Leaf: basal generally 10--25 cm, sheathing base generally glabrous, lateral leaflet pairs 3--4, terminal leaflet generally 20--50 mm, widely obovate, rounded, teeth single to double, 6--11 per side. Inflorescence: not leafy, narrow, branch angle generally 10--30°; pedicels generally 1--10 mm, lowermost to 20 mm, glandular hairs and short nonglandular hairs abundant. Flower: opening widely; hypanthium bractlets 2--4 mm, 0.5--1 mm wide, linear to narrow-elliptic; sepals 4--8 mm, acute; petals spreading, 4--7 mm, >= sepals, widely obovate, cream; styles +- 1 mm. Fruit: < 1 mm, light brown.
Ecology: Moist meadows; Elevation: 1200--2200 m. Bioregional Distribution: CaR, SN. Flowering Time: Jun--Sep Note: Coarser plants from Wrn probably undescribed taxon. Intergrades with Drymocallis lactea at higher elevation.
Synonyms: Potentilla glandulosa subsp. hansenii (Greene) D.D. Keck
Unabridged Note: Similar to Drymocallis convallaria (Rydb.) Rydb. (Alaska to Oregon, Montana, Utah) with tall, generally single stem 2--4 mm diam; comparable but coarser plants from Wrn probably undescribed. Intergrades with Drymocallis lactea at higher elevation.
eFlora Treatment Author: Barbara Ertter
Jepson Online Interchange

Previous taxon: Drymocallis glandulosa var. wrangelliana
Next taxon: Drymocallis lactea

Name Search


Citation for this treatment: Barbara Ertter 2016. Drymocallis hansenii, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 01, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 01, 2016.

Drymocallis hansenii
click for enlargement
© 2009 Barry Breckling
Drymocallis hansenii
click for enlargement
© 2009 Barry Breckling
Drymocallis hansenii
click for enlargement
© 2009 Barry Breckling

More photos of Drymocallis hansenii in CalPhotos

Geographic subdivisions for Drymocallis hansenii:
CaR, SN.
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.
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).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
View all CCH records

CCH collections by month

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