Jepson eFlora: Taxon page
Vascular Plants of California
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


Lavatera trimestris
ANNUAL LAVATERA, ROSE MALLOW


Higher Taxonomy
Family: MalvaceaeView DescriptionDichotomous Key
Common Name: MALLOW FAMILY
Habit: Annual to tree; generally with stellate hairs, often with bristles or peltate scales; juice generally mucilage-like; bark fibrous. Leaf: generally cauline, alternate, petioled, simple [palmate-compound], generally palmate-lobed and/or veined, generally toothed, evergreen or not; stipules persistent or not. Inflorescence: head, spike, raceme, or panicle, in panicle or not (a compound panicle), or flowers >= 1 in leaf axils, or flowers generally 1 opposite a leaf or on a spur; bracts leaf-like or not; bractlets 0 or on flowering stalks, often closely subtending calyx, generally in involucel. Flower: generally bisexual, radial; sepals 5, generally fused at base, abutting in bud, larger in fruit or not, nectaries as tufts of glandular hairs at base; petals (0)5, free from each other but generally fused at base to, falling with filament tube, clawed or not; stamens 5--many, filaments fused for most of length into tube around style, staminodes 5, alternate stamens, or generally 0; pistil 1, ovary superior, stalked or generally not, chambers generally >= 5, styles or style branches, stigmas generally 1 or 1--2 × chamber number. Fruit: loculicidal capsule, [berry], or 5--many, disk- or wedge-shaped segments (= mericarps).
Genera In Family: 266 genera, 4025 species: worldwide, especially warm regions; some cultivated (e.g., Abelmoschus okra; Alcea hollyhock; Gossypium cotton; Hibiscus hibiscus). Note: Recently treated to include Bombacaceae, Sterculiaceae, Tiliaceae. Mature fruit needed for identification; "outer edges" are surfaces between sides and back (abaxial surface) of segment. "Flower stalk" used instead of "pedicel," "peduncle," especially where both needed (i.e., when flowers both 1 in leaf axils and otherwise).
eFlora Treatment Author: Steven R. Hill, except as noted
Scientific Editor: Steven R. Hill, Thomas J. Rosatti.
Genus: LavateraView DescriptionDichotomous Key


Habit: Annual, biennial, perennial herb, shrub, +- glabrous to stellate-hairy. Stem: erect, herbaceous to soft-woody. Leaf: petioled; blade ovate to lanceolate, shallowly to deeply 5--7(9)-lobed or lobes 0, generally crenate to dentate. Inflorescence: raceme-like or generally flowers 1[several] in leaf axils; bractlets 3, fused generally 1/2. Flower: generally showy; petals pink, purple, rose-purple or white, dark-veined or not; anthers near top of filament tube, below, generally not clustered; stigmas linear, on inner side of style branches. Fruit: +- disk-like; segments (6)10--19, indehiscent, smooth or variously ribbed and/or hairy, outer edges generally rounded, beak 0. Seed: 1 per segment, generally not firmly enclosed by, readily separating from fruit wall, reniform, glabrous.
Species In Genus: +- 12 species: Europe, especially Mediterranean, Asia, Africa. Etymology: (Lavater brothers, 17th century Swiss physicians, naturalists) Note: Most species transferred to Malva, primarily on molecular data (Ray 1995, 1998); other commonly cultivated species that may escape including Lavatera cashmiriana Camb., Lavatera thuringiaca L.
Reference: Ray 1998 Novon 8:288--295
Unabridged Reference: Ray 1995 Pl Syst Evol 198:29--53; Ray 1998 Novon 8(3): 288--295
Lavatera trimestris L.
WAIF
Stem: erect, generally 0.5--1 m, generally bristly. Leaf: petiole to 9--13 cm; stipules 2--5 mm, generally deciduous; lower blades 3--12 cm, 2.5--5 cm wide, rounded to cordate, crenate, upper generally smaller, shallowly palmate-3--7-lobed, lobes acute to obtuse. Inflorescence: flowers 1 in leaf axils, generally +- clustered toward stem tips; flowering stalks 2.5(7) cm; bractlets 1 cm, +- 1 cm wide, ovate, lobes 6, 3 smaller alternate 3 larger. Flower: calyx +- 15 mm, sparsely hairy; petals 2--5 cm; anthers on upper 2/3 of filament tube. Fruit: segments +- 12, ridged, covered by disk-like expansion from central axis. Chromosomes: 2n=14.
Ecology: Water edge, disturbed places; Elevation: < 300 m. Bioregional Distribution: w SCo (Lauro Canyon, Santa Barbara Co.), WTR; Distribution Outside California: native to Mediterranean, widely cultivated. Flowering Time: May--Jun Note: Rarely escapes cultivation.
Jepson eFlora Author: Steven R. Hill
Reference: Ray 1998 Novon 8:288--295
Unabridged Reference: Ray 1995 Pl Syst Evol 198:29--53; Ray 1998 Novon 8(3): 288--295
Jepson Online Interchange

Previous taxon: Lavatera olbia
Next taxon: Malacothamnus

Name Search

Contact/Feedback

Citation for this treatment: Steven R. Hill 2012, Lavatera trimestris, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=30378, accessed on October 15, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on October 15, 2019.

No expert verified images found for Lavatera trimestris.



Geographic subdivisions for Lavatera trimestris:
w SCo (Lauro Canyon, Santa Barbara Co.), WTR
MAP CONTROLS
1. You can change the display of the base map and layers by clicking on the layer control box in the upper right-hand corner.
2. California county polygons can be turned off and on in the layer control box.
3. Filling of Jepson subdivision polygons can be turned off and on in the layer control box.
4. Marker clustering can be turned on by clicking this link:      Marker Clustering ON
WARNING: This page may load slowly if there are large numbers of specimens in the database.
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.
MAP LEGEND
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
READ ABOUT YELLOW FLAGS


CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.