Crocanthemum corymbosum

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Crocanthemum corymbosum
Croc cory.jpg
Photo by Jeff Norcini, Atlas of Florida Vascular Plants
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Order: Violales
Family: Cistaceae
Genus: Crocanthemum
Species: C. corymbosum
Binomial name
Crocanthemum corymbosum
Michx.
Heli cory dist.jpg
Natural range of Crocanthemum corymbosum from USDA NRCS Plants Database.

Common names: Pine barren frostweed; pinebarren sunrose

Taxonomic notes

Synonym: Helianthemum corymbosum Michaux

Varieties: none

Description

C. corymbosum is a perennial species with alternate, simple leaves.[1] It has tomentose stems.[2]

Generally, for the Crocanthemum genus, they are erect, heraceous or suffrutescent perennials with alternate, stellate-pubescent leaves. There are two types of flowers, chasmogamous and cleistogamous. Chasmogamous flowers are on the pedicels that elongate to usually more than 1 cm long with large showy, tallow petals; there are numerous stamens and large sepals. The cleistogamous flowers are on the pedicels are usually less than 3 mm long, where the petals are absent, the stamens are few and the sepals are smaller than those of the chasmogamous flowers. The sepals are in 2 whorls, the outer are narrower than the inner. The capsule is 3-locular. [3]

Specifically, for Crocanthemum corymbosum species, the roots have tuberous thickenings, the stems grow 1.3-5 tall, stellate canescent. The basal leaves are absent; the stem leaves 10-20, elliptic to oblanceolate, growing 1.5-3 cm long, and 5-10 mm wide, stellate-canescent above, tomentose beneath. The petioles 1-3 mm long. The cleistogamous flowers in compact terminal cymes; pedicels usually less than 5 mm long; the sepals and capsules 3-4 mm long. The chasmogamous flowers on pedicels 1-2 cm, scattered in the compact, the cleistogamous infloresence, or arising from its base; petals ca. 1 cm long; sepals and ovoid capsule, 5-7 mm long, pilose. The seeds are reddish brown in color, 1-1.2 mm long.[3]

Distribution

Ecology

Habitat

It can been found in upland, well-drained sandy habitats, such as scrubby flatwoods (Pearson 1954).[4] It has been observed growing in drying sand (FSU Herbarium). Associated species include Quercus virginiana, Q. myrtifolia, Q. pumila, Q. chapmanii, Serenoa repens, Osmanthus americanus, Vaccinium myrsinites, Aristida strica, and Trilisa odoratissima" (Pearson 1954).

Phenology

The canary yellow flowers bloom March through June.[5]

Pollination

The following Hymenoptera families and species were observed visiting flowers of Crocanthemum corymbosum at Archbold Biological Station.[6]

Halictidae: Lasioglossum nymphalis

Conservation and management

Cultivation and restoration

Photo Gallery

References and notes

Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: October 2015. Collectors: Loran C. Anderson. States and Counties: Florida: Franklin. Compiled by Tall Timbers Research Station and Land Conservancy.

Pearson, Paul G.. “Mammals of Gulf Hammock, Levy County, Florida”. American Midland Naturalist 51.2 (1954): 468–480.
  1. [Southeastern Flora]Accessed: December 11, 2015
  2. [[1]]Accessed: December 14, 2015
  3. 3.0 3.1 Radford, Albert E., Harry E. Ahles, and C. Ritchie Bell. Manual of the Vascular Flora of the Carolinas. 1964, 1968. The University of North Carolina Press. 718-9.
  4. [[2]]Accessed: December 15, 2015
  5. [Hawthorn Hill Flowers Blogspot]
  6. Deyrup, M.A. and N.D. 2015. Database of observations of Hymenoptera visitations to flowers of plants on Archbold Biological Station, Florida, USA.