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CROSSOSOMATACEAE CROSSOSOMA FAMILY

Robert E. Preston & James R. Shevock

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.
4 genera, 9 species: western United States, Mexico. [Sosa & Chase 2003 Syst Bot 28:96–105] —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Thorne & Scogin 1978 Aliso 9:171–178; Sosa & Chase 2003 Syst Bot 28:96–105]

Key to Crossosomataceae

GLOSSOPETALON
Small shrub, generally densely branched. Stem: angled, ± green, ± thorny at tips or not, hairs 0 to sparse. Leaf: small, generally deciduous, ± entire, ± sessile. Flower: petals narrow-oblanceolate, white. Fruit: ovoid, generally striate, generally beaked. Seed: generally 1–2, generally brown; aril ± inconspicuous, generally ± white.
± 5 species: western United States, northern Mexico, especially limestone in desert mountains. (Greek: tongue petal, from petal shape) [Yatskievych 2007 Novon 17:529–530]
Unabridged references: [Holmgren 1988 Brittonia 40:269–274]
Unabridged note: Formerly treated as Forsellesia, in Celastraceae.

Key to Glossopetalon

G. spinescens A. Gray var. aridum M.E. Jones NEVADA GREASEWOOD
NATIVE
Plant < 2 m, ± erect. Stem: ± thorny at tips. Leaf: 5–17 mm, oblong to obovate; veins ± inconspicuous abaxially. Flower: sepals ± rounded, 0 spine-tipped; petals 3–7 mm; stamens 6–10, ± equal. Seed: 1–2, 2–3 mm, generally shiny brown.
Limestone; 850–2720 m. s Klamath Ranges, s High Sierra Nevada (Piute Mtns, Kern Co.), San Bernardino Mountains (n base), White and Inyo Mountains, Desert Mountains; to Washington, Wyoming, Texas, northern Mexico. Apr–May [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Oct 22 2014
Citation for this treatment: [Author of taxon treatment] 2013. Glossopetalon, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=59588, accessed on Oct 22 2014

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Geographic subdivisions indicated for the distribution of Glossopetalon spinescens var. aridum 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.