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Taxus floridana

(Canada Yew)

Overview

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Critically Endangered

Threat status

Interesting Facts

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Common Names

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Common Names in English:

Canada Yew, Florida Yew

Description

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Family Taxaceae

Trees or shrubs evergreen , dioecious or rarely monoecious. Leaves spirally arranged or decussate, linear or lanceolate, abaxial surface with 1 stomatal band on each side of prominent or inconspicuous midvein , resin canal present or absent. Pollen cones solitary in leaf or bract axils, or aggregated into spikelike complexes apically on branches; microsporophylls numerous ; pollen sacs 3-9, radially arranged or on outer side of microsporophyll and then with distinct adaxial and abaxial surfaces; pollen nonsaccate. Seed-bearing structures solitary or paired in axils of leaves or bracts, pedunculate or sessile, with several overlapping or decussate bracts at base ; ovule solitary, borne at apex of floral axis, erect . Seed sessile or pedunculate, drupelike or nutlike, partially enclosed in a succulent, saccate or cupular aril, or completely enclosed within aril; female gametophyte tissue abundant. Cotyledons 2. Germination epigeal, hypogeal in Torreya.

Five genera and 21 species; mainly N hemisphere (except Austrotaxus R. H. Compton: New Caledonia) ; four genera (one endemic) and 11 species (five endemic, one introduced ) in China.[1]

Physical Description

Species Taxus floridana

Shrubs or small trees to 6(--10) m , dioecious, trunk to 3.8 dm diam. Bark purplish brown, thin, scaly . Branches stout, spreading . Leaves 1--2.6(--2.9) cm ´ 1--2(--2.2) mm, mostly slightly falcate , light green with 2 grayish bands abaxially, with cuticular papillae along stomatal bands, dark green adaxially, epidermal cells as viewed in cross section of leaf wider than tall or ± isodiametric. Seed ellipsoid , 5--6 mm. Seeds maturing in early fall . [source]

Habit: Tree

Flowers: Bloom Period: n/a • Flower Color: inconspicuous, none

Size/Age/Growth

Size: 12-15' tall.

Habitat

Moist, shaded ravines in hardwood forests ; of conservation concern; 15--30 m [2].

Biome: Terrestrial [3].

Ecology: Almost entirely restricted to the mid and lower slopes within a few ravines along the the Apalachicola River Bluffs area. Soils are generally moist and acidic. It occurs with a rich assemblage of evergreen and deciduous species including another threatened endemic conifer, Torreya taxifolia. Florida yew is generally shade tolerant and very fire sensitive .[3].

List of Habitats :

Biology

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Reproduction

Duration: Perennial

Growth

Culture: Space 12-15' apart.

Sunlight: Sun Exposure: Sun to Partial Shade.

Temperature: Cold Hardiness: 8a, 8b. (map)

Taxonomy

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Synonyms

Taxus Baccata Floridana • Taxus baccata floridana (Nutt. Ex Chapm.) Pilg. • Taxus baccata L. var. floridana (Nutt. Ex Chapm.) Pilg. • Taxus baccata Linnaeus var. floridana (Nuttall Ex Chapman) Pilger • Taxus Canadensis Floridana • Taxus canadensis Marshall var. floridana (Nutt. Ex Chapm.) Silba • Taxus canadensis var. floridana (Nutt. Ex Chapm.) Silba

Notes

Name Status: Accepted Name .

Comment: Conservation status: CR (B1+2c), Habit: Tree

Last scrutiny: 5-Jun-2008

Similar Species

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Members of the genus Taxus

ZipcodeZoo has pages for 51 species, subspecies, varieties, forms, and cultivars in this genus:

T. baccata (Common Yew) · T. baccata brevifolia (Pacific Yew) · T. baccata cuspidata (Japanese Yew) · T. baccata 'Amersfoort' (Amersfoort English Yew) · T. baccata 'Fastigiata' (English Yew) · T. baccata 'Jacksonii' (English Yew) · T. baccata 'Lutea' (English Yew) · T. baccata 'Repandens' (Repandens Spreading English Yew) · T. baccata 'Repandens Aurea' (Spreading English Yew) · T. baccata 'Standishii' (Standishii English Yew) · T. baccata 'Stricta' (Irish Yew) · T. baccata 'Watnong Gold' (English Yew) · T. brevifolia (Canadian Yew) · T. canadensis (Canada Yew) · T. cuspidata (Japanese Yew) · T. cuspidata Siebold & Zucc. forma latifolia (Pilg.) Fitsch. (Japanese Yew) · T. cuspidatavar. densa (Japanese Yew) · T. cuspidata 'Aurea' (Japanese Yew) · T. cuspidata Siebold & Zucc. 'Densiformis' (Japanese Yew) · T. cuspidata Siebold & Zucc. 'Expansa' (Japanese Yew) · T. cuspidata Siebold & Zucc. 'Hunewellii' (Japanese Yew) · T. cuspidata Siebold & Zucc. 'Intermedia' (Japanese Yew) · T. cuspidata Siebold & Zucc. 'Nana Aurea' (Japanese Yew) · T. cuspidata Siebold & Zucc. 'Prostrata' (Japanese Yew) · T. cuspidata Siebold & Zucc. 'Sieboldii' (Japanese Yew) · T. cuspidata Siebold & Zucc. 'Stricta' (Japanese Yew) · T. cuspidata 'Aurescens' (Japanese Yew) · T. cuspidata 'Capitata' (Capitata Yew) · T. cuspidata 'Dwarf Bright Gold' (Japanese Yew) · T. cuspidata 'Monloo' (Emerald Spreader Yew) · T. cuspidata 'Silver Queen' (Japanese Yew) · T. cuspidata 'Winter Jewel' (Cone Winter Jewel Japanese Yew) · T. floridana (Florida Yew) · T. jacksonii (English Yew) · T. nucifera (Japanese-Nutmeg) · T. wallichiana (Himalayan Yew) · T. x media'Flushing' (Anglo-Japanese Yew) · T. x media 'Beanpole' (Beanpole Hybrid Yew) · T. x media 'Bean Pole' (Anglojap Yew) · T. x media 'Brownii' (Anglojap Yew) · T. x media'Citation' (Citation Upright Yew) · T. x media 'Densiflora' (Anglojap Yew) · T. x media 'Densiformis' (Dense Spreading Yew) · T. x media 'Densiformis Select' (Select Dense Spreading Yew) · T. x media 'Green Mountain' (Green Mountain Yew) · T. x media 'Hicksii' (Hicks Yew) · T. x media 'Kelseyi' (Anglojap Yew) · T. x media 'Lc Bobbink' (Anglojap Yew) · T. x media 'Maureen' (Anglojap Yew) · T. x media 'Tauntonii' (Taunton`s Yew) · T. x media 'Viridis' (Columnar Yew)

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 December 06, 2007:

Identifiers

Footnotes

  1. Liguo Fu, Nan Li & Robert R. Mill "Taxaceae". in Flora of China Vol. 4 Page 89. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  2. "Taxus floridana". in Flora of North America Vol. 2. Oxford University Press. Online at EFloras.org. [back]
  3. Spector, T., Thomas, P. & Determann, R. 2011. Taxus floridana. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 05 February 2012. [back]
Last Revised: 7/15/2012