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Santolina chamaecyparissus

(Cotton Lavender)

Overview

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Medium growing spreading perennial . Small yellow flowers. Fragrant, evergreen gray foliage make this a valuable edging and rock garden perennial. Likes sun. Blooms beginning in late summer. Height 18-24 inches. Spacing 15-18 inches. Prefers well-drained sandy or loamy soil in full sun . Cut back each spring . Prune hard after flowering in June. Zones 6-8..

Common Names

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Common Names in English:

Cotton Lavender, Gray Santolina, Lavender Cotton, Lavender-Cotton

Description

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Genus Santolina

Subshrubs , [5-]10-60 cm (sometimes ± rhizomatous ; aromatic ). Stems usually 1, ± erect [decumbent to ascending ], branched mostly from bases [± throughout], often tomentose to lanate , sometimes glabrate or glabrous [sericeous ] (hairs mostly medifixed ) and gland-dotted. Leaves cauline [mostly basal]; alternate; petiolate or sessile; blades narrowly oblong or spatulate to linear , usually 1-pinnately lobed (lobes usually crowded and overall effect ± vermiform ), ultimate margins entire or ± crenate , faces usually arachnose or tomentose to lanate, sometimes glabrate or glabrous [sericeous]. Heads discoid , borne singly (pedunculate ). Involucres campanulate to hemispheric or broader, [3-]6-10[-12+] mm diam. Phyllaries persistent (soon indurate ), 18-45+ in 3(-5+) series, distinct , lanceolate to elliptic (usually carinate ), unequal, margins and apices (usually light to dark brown, sometimes purple) scarious (abaxial faces glabrous or ± arachnose, glabrescent ). Receptacles convex to hemispheric, paleate; paleae ± lanceolate, ± navicular (each with central resin duct ). Ray florets 0. Disc florets mostly 60-250+, bisexual , fertile ; corollas pale to bright or deep yellow [whitish], tubes often compressedwinged and/or saccate , ± clasping apices of cypselae), throats ± funnelform , lobes 5, lance-ovate. Cypselae obconic to obovoid , sometimes slightly obcompressed , 3-5-angled, faces glabrous (pericarps sometimes with myxogenic cells , without resin sacs) ; pappi 0. x = 9.

Species 8-12+: introduced ; s Europe, n Africa.[1]

Physical Description

Species Santolina chamaecyparissus

Subshrubs , silvery-gray to white. Leaf blades 1-pinnately lobed , 10-20(-40) × 1-3(-5) mm. Peduncles 3-6 cm. Phyllaries carinate , apices of inner rounded , ± lacerate to fimbrillate . Corollas 3-4 mm, gland-dotted. Cypselae 2.5-3 mm, angles sometimes narrowly winged . 2n = 18. [source]

Santolina chamaecyparissus is widely cultivated and probably persists in the flora area in states other than those listed here. [source]

Habit: Mounding

Flowers: Button-like flowers. Blooms in the summer. • Bloom Period: March, April, May, June, July, August, September, October. • Flower Color: Yellow • Flower Conspicuous: Small button-shaped blooms on long stems

Foliage: Aromatic , silver-tinged, toothed , finely cut and ferm-like • Foliage Shape: OblongNormal foliage color: Gray • Underside foliage: Gray • Juvenile foliage: Gray • Mature foliage: Gray • New foliage: Gray • Spring foliage: Gray • Summer foliage: Gray • Fall foliage: Gray • Winter foliage: Gray

Size/Age/Growth

Growth Rate: Moderate Growing • Size: Moderate grower to 1½ ft . tall, 3 ft. wide.

Landscaping

Care: Follow a regular watering schedule during the first growing season to establish a deep, extensive root system . Feed with a general purpose fertilizer before new growth begins in spring . For a formal appearance , shear annually after flowering.

Habitat

Disturbed sites, abandoned plantings ; 0-400 m

Biology

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Reproduction

Duration: Perennial

Growth

Culture: Space 9-12" apart.

Soil: Prefers organic soil. Needs good drainage . • Minimum pH: 6.6 • Maximum pH: 9.0

Sunlight: Sun Exposure: Full sun

Moisture: Water Requirements: Water regularly, when top 3" of soil is dry.

Temperature: Heat Zones: High: 9 (>120 to 150 days) Low:5 (>30 to 45 days) (map) • Cold Hardiness: 7a, 7b, 8a, 8b, 9a, 9b. (map)

Taxonomy

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Notes

Name Status: Accepted Name . Latest taxonomic scrutiny: 15-Mar-2000

Place of publication : Sp. pl. 2:842. 1753

Name verified on 07-Nov-1985 by ARS Systematic Botanists. Last updated: 31-Dec-2001

Similar Species

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Members of the genus Santolina

ZipcodeZoo has pages for 93 species, subspecies, varieties, forms, and cultivars in this genus:

S. ablongifolia · S. africana · S. ageratifolia · S. ageratum · S. alpina · S. amellus · S. annua · S. anthemoides · S. ascensionis · S. benthamiana · S. canescens · S. chamaecyparissus (Cotton Lavender) · S. chamaecyparissus L. var. corsica Fiori · S. chamaecyparissus 'Double Lemon' · S. chamaecyparissus 'Lambrook Silver' · S. chamaecyparissus 'Lavender Cotton' · S. chamaecyparissus 'Lemon Fizz' · S. chamaecyparissus 'Lemon Queen' (Cotton Lavender) · S. chamaecyparissus magonica · S. chamaecyparissus 'Nana' (Dwarf Lavender-Cotton) · S. chamaecyparissus 'Pretty Carol' · S. chamaecyparissus 'Pretty Carroll' (Pretty Carroll Santolina) · S. chamaecyparissus 'Small-Ness' · S. chamaecyparissus 'Small Ness' · S. chamaecyparissus squarrosa · S. chamaecyparissus tomentosa · S. chamaecyparissus var. nana 'Weston' · S. chamecyparissus · S. corsica · S. crenata · S. crithmifolia · S. cuneifolia · S. cupressiformis · S. dentata · S. elegans · S. erecta · S. ericoides · S. eriosperma · S. etrusca · S. flava · S. fragrantissima · S. heterophylla · S. impressa · S. incana (Lavender Cotton) · S. incana 'Nana' (Lavender Cotton) · S. incana neapolitana (Neapolitan Santolina) · S. insularis · S. jamaicensis · S. leucantha · S. ligustica · S. lindavica · S. linearifolia · S. macrophylla · S. marchii · S. maritima · S. melidensis · S. millefolium · S. montana · S. neapolitana · S. nobilis · S. oblongifolia · S. 'Oldfield Hybrid' · S. oppositifolia · S. pectinata · S. pinnata (Green Santolina) · S. pinnata neapolitana · S. pinnata neapolitana 'Edward Bowles' · S. pinnata neapolitana 'Sulphurea' · S. rosmarinifolia (Green Lavender Cotton) · S. rosmarinifolia 'Caerulea' · S. rosmarinifolia canescens · S. rosmarinifolia 'Morning Mist' (Green Lavender Cotton) · S. rosmarinifolia rosmarinifolia · S. rosmarinifolia rosmarinifolia cream-flowered · S. rosmarinifolia rosmarinifolia 'Primrose Gem' · S. rosmarinifolia rosmarinifolia white-flowered · S. 'Sant101' · S. semidentata · S. Shades of Jade = 'Sant101' · S. sinaica · S. squarrosa · S. suaveolens · S. tinctoria · S. tomentosa · S. trifurcata · S. tuberculosa · S. variifolia · S. villosa · S. virens (Green Lavender Cotton) · S. viridis · S. viscosa · S. zamorana · S. rosmarinifolia melidensis

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal November 29, 2007:

Identifiers

Footnotes

  1. Linda E. Watson "Santolina". in Flora of North America Vol. 19, 20 and 21 Page 26, 487, 497. Oxford University Press. Online at EFloras.org. [back]
Last Revised: 7/1/2009