Jepson Flora Project: Jepson Interchange    

 
link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.

CONVOLVULACEAE

MORNING-GLORY FAMILY

Lauramay T. Dempster (except Calystegia)

Perennial (annual), generally twining or trailing
Leaves alternate
Inflorescence: cyme or flowers solitary in axils; pedicels often with 2 bracts
Flower bisexual, radial; sepals 5, ± free, overlapping, persistent, often unequal; corolla generally showy, generally bell-shaped, ± shallowly 5-lobed, generally pleated and twisted in bud; stamens 5, epipetalous; pistil 1, ovary superior, chambers generally 2, ovules generally 2 per chamber, styles 1–2
Fruit: generally capsule
Seeds 1–4(6)
Genera in family: 50 genera, 1,000 species: warm temp to tropical; some cultivated as ornamental
Recent taxonomic note: Recently treated to include Cuscutaceae [Angiosperm Phylogeny Group 1998 Ann Missouri Bot Gard 85:531–553].
(Family description, key to genera by L.T. Dempster)

CALYSTEGIA

MORNING-GLORY

Richard K. Brummitt

Perennial, subshrub from caudex or rhizome, glabrous to tomentose
Stem very short to high-climbing, generally twisting and twining
Leaf generally > 1 cm, linear to reniform, often sagittate to hastate, rarely deeply divided
Inflorescence: peduncle generally 1-flowered; bractlets small and remote from calyx to large and concealing calyx, sometimes lobed
Flower generally showy; corolla glabrous, white or yellow to pink or purple; ovary chamber 1 (septa generally incomplete), stigma lobes 2, generally swollen, cylindric or oblong, ± flattened
Fruit ± spheric, ± inflated
Seeds generally ± 4
Species in genus: ± 25 species: temp, worldwide
Etymology: (Greek: concealing calyx, from bractlets of some)
Reference: [Brummitt 1980 Kew Bull 35(2):327–328]
Intergradation common; intermediate forms often difficult to identify. Appears similar to Convolvulus , but anatomy suggests that the 2 genera are not very closely related.

Native

C. peirsonii (Abrams) Brummitt

PEIRSON'S MORNING-GLORY

Perennial from rhizome, glabrous, ± glaucous
Stem decumbent to weakly climbing, < 0.4 m
Leaf: blade < 2 cm at midrib, narrowly triangular; lobes sometimes = blade, broadest at tip, generally distinctly 2-tipped; sinus rounded to ± square
Inflorescence: peduncle 2–8 cm, generally < subtending leaf; bractlets attached 0–3 mm below calyx and overlapping it, 3–7 mm, 2.5–4 mm wide, elliptic to widely oblong, entire, flat
Flower: calyx 9–13 mm; corolla 25–40 mm, white
Ecology: UNCOMMON. Rocky slopes
Elevation: 1000–1500 m.
Bioregional distribution: n San Gabriel Mountains, adjacent Mojave Desert (Antelope Valley)
Flowering time: May–Jun
Synonyms: Convolvulus p. Abrams
Intergrades with C. longipes , mainland coastal C. macrostegia, C. occidentalis subsp. o., perhaps C. sepium
Horticultural information: TRY.
See the CNPS Inventory for information about endangerment and rarity.
previous taxon | next taxon
bioregional map for CALYSTEGIA%20peirsonii being generated
 
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Calystegia peirsonii
Retrieve dichotomous key for Calystegia
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
Return to the Jepson Interchange main page
Return to treatment index page
Glossary
    FEEDBACK
  • This page is no longer being maintained.


University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California