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Diplazium pycnocarpon

(Glade Fern)

Interesting Facts

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Common Names

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Click on the language to view common names.

Common Names in English:

Glade Fern, Narrow Leaf Spleenwort, Narrow-Leaved Glade Fern, Narrow-Leaved-Spleenwort

Common Names in French:

Diplazie , Diplazie à Sores Denses

Description

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Genus Diplazium

Plants terrestrial or on rock. Stems creeping , ascending , or erect , stolons absent. Leaves monomorphic , evergreen or dying back in winter. Petiole ca. 1/2 to equaling length of blade , base swollen and persisting as trophopod over winter or not; vascular bundles 2, lateral , lunate in cross section . Blade oblong-lanceolate to deltate, 1-pinnate to 2-pinnate-pinnatifid [simple to 4-pinnate-pinnatifid], gradually reduced distally to pinnatifid apex or apical pinna similar to (conform) adjacent pinnae, herbaceous to papery . Pinnae not articulate to rachis, segment margins entire, crenulate , or serrate; proximal pinnae not reduced, sessile, equilateral or inequilateral ; costae adaxially deeply grooved , grooves continuous with that of rachis; indument abaxially absent or of linear to ovate scales , adaxially absent. Veins free , simple or forked , or basal pairs of adjacent segments anastomosing. Sori single or paired back-to-back on veins, oblong to linear, straight or slightly falcate ; indusia linear, laterally attached, persistent . Spores brownish, usually broadly winged . x = 40, 41.

Species about 400: worldwide.

In a few species outside the flora , rachises and costae bear multicellular hairs like those of Deparia, which differs from Diplazium in having grooves of costae not decurrent onto rachis groove, veins free or anastomosing, sori long or short and costular , and indusia present or absent. Many species of Diplazium are known to reproduce apogamously.[1]

Physical Description

Species Diplazium pycnocarpon

Stems creeping ; scales brown, broadly lanceolate, margins entire. Petiole 15--40(--50) cm. Blade oblong-lanceolate, 1-pinnate, 30--75 × 8--25 cm, ± narrowed to base with reduced proximal pinnae, broadest above base, abruptly acuminate to apex. Pinnae linear, ± entire to shallowly crenulate , base truncate or acroscopically auriculate , apex acuminate. Veins usually 1--2-forked, nearly reaching sinuses between crenations . Sori elongate , straight or slightly falcate , single or rarely double ; indusia vaulted, ± thick. 2 n = 80. [source]

Diplazium pycnocarpon has commonly been placed in Athyrium, but it is closely related to the east Malesian Diplazium flavoviride Alston (M. Kato and D. Darnaedi 1988). [source]

Habit: Deciduous.

Flowers: Bloom Period: n/a • Flower Color: near white, white

Size/Age/Growth

Size: 36-48" tall.

Habitat

Moist woods and slopes in neutral soil; 150--1000 m [2].

Biology

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Growth

Culture: Space 24-36" apart.

Sunlight: Sun Exposure: Partial to Full Shade.

Temperature: Cold Hardiness: 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a. (map)

Taxonomy

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Synonyms

Anleit. Kenntn. Gew. 3: 112. 1804 • Asplenium pycnocarpon Sprengel • Athyrium pycnocarpon (Spreng.) Tidestrom • Athyrium pycnocarpon (Sprengel) Tidestrom • Homalosorus pycnocarpos (Sprengel) Pichi-Sermolli

Notes

Name Status: Accepted Name .

Last scrutiny: 15-Mar-2000

Similar Species

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Members of the genus Diplazium

ZipcodeZoo has pages for 16 species, subspecies, varieties, forms, and cultivars in this genus:

D. centripetale (Royal Twinsorus Fern) · D. cristatum (Crested Twinsorus Fern) · D. esculentum (Vegetable Fern) · D. expansum (Great Fern) · D. grandifolium (Largeleaf Twinsorus Fern) · D. hymenodes (Peacock Fern) · D. lherminieri (L'herminier's Twinsorus Fern) · D. lonchophyllum (Lance-Leaf Twin-Sorus Fern) · D. meyenianum (Meyen's Twin-Sorus Fern) · D. molokaiense (Molokai Twin-Sorus Fern) · D. plantaginifolium (Plantainleaf Twinsorus Fern) · D. pycnocarpon (Glade Fern) · D. riedelianum (Riedel's Twinsorus Fern) · D. sandwichianum (Hawai'i Twinsorus Fern) · D. striatum (Striped Twinsorus Fern) · D. unilobum (Singlelobe Twinsorus Fern)

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 February 28, 2008:

Identifiers

Footnotes

  1. Masahiro Kato "Diplazium". in Flora of North America Vol. 2. Oxford University Press. Online at EFloras.org. [back]
  2. "Diplazium pycnocarpon". in Flora of North America Vol. 2. Oxford University Press. Online at EFloras.org. [back]
Last Revised: 7/15/2012