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
Crossosoma californicum

Higher Taxonomy
Family: CrossosomataceaeView DescriptionDichotomous Key

Habit: Shrub, small tree. Stem: generally glabrous; branchlets or twigs generally thorny. Leaf: generally deciduous, simple, generally small, generally alternate, entire; stipules minute or 0. Inflorescence: flowers 1. Flower: generally bisexual, radial; hypanthium short; sepals, petals generally 5(3--6), free; petals generally white, ephemeral; stamens 4--50, on or around disk; pistils 1--9, simple, styles short, stigmas head-like, ovules generally 2--many. Fruit: follicles, 1--9. Seed: brown to black, arilled.
Genera In Family: 4 genera, 9 species: western United States, Mexico.
eFlora Treatment Author: Robert E. Preston & James R. Shevock
Scientific Editor: Thomas J. Rosatti.
Genus: CrossosomaView DescriptionDichotomous Key

Leaf: deciduous (or dry when dormant); petiole 0--short. Inflorescence: peduncle bracted or not. Flower: petals 9--15 mm, +- round or oblong, generally white. Fruit: cylindric, surface smooth or net-like, beak 1--2 mm. Seed: generally > 2 per fruit, black, shiny, round to flat; aril conspicuous, fringed, +- yellow.
Species In Genus: 2 species: southern California to Arizona, Mexico. Etymology: (Greek: fringe body, from aril)

Crossosoma californicum Nutt.
Habit: Plant 1--5 m. Stem: branchlets +- thorny. Leaf: oblong (to obovate or spoon-shaped). Flower: sepals round-ovate; petals 12--15 mm, +- round, white, +- clawed. Fruit: 2--9, 15--20 mm, +- recurved at tip. Seed: generally > 20, +- 2.5 mm diam.
Ecology: Dry, rocky slopes, canyons; Elevation: < 610 m. Bioregional Distribution: c SCo (Palos Verdes Peninsula), s ChI (San Clemente, Santa Catalina islands); Distribution Outside California: Baja California (Guadalupe Island). Flowering Time: Feb--May
eFlora Treatment Author: Robert E. Preston & James R. Shevock
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

Previous taxon: Crossosoma bigelovii
Next taxon: Glossopetalon

Name Search
botanical illustration including Crossosoma californicum


Citation for this treatment: Robert E. Preston & James R. Shevock 2017. Crossosoma californicum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 23, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on May 23, 2017.

Geographic subdivisions for Crossosoma californicum:
c SCo (Palos Verdes Peninsula), s ChI (San Clemente, Santa Catalina islands);
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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.