Ophioglossum richardsiae J.E. Burrows

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Common names:
Status: Native
Perennial herb with deciduous aerial parts. Rhizome fusiform to thickly linear, 7–22 mm long, 1.5–5 mm wide; roots fleshy, horizontal, proliferous. Leaves usually single; stipe (12–)27–69(–100) mm long, 25–40% of its length subterranean, stipe:lamina length ratio 0.5–1.9:1, stipe bases not persistent; lamina dull green, elliptic, narrowly elliptic or lanceolate, fertile lamina somewhat folded along the midline, (22–)28–50(–60) mm long, (6–)8–13(–15) mm wide, length:width ratio 2.5–5.7:1, apex acute, often apiculate, base narrowly cuneate, margins flat; venation linear medially, elongate laterally, with secondary veins and included veinlets confined to the lateral areoles; epidermal cells linear with wavy walls medially, to elongate with sinuous anticlinal walls laterally; stomata partially aligned. Fertile spike (77–)95–115(–140) mm long, fertile spike:lamina length ratio 2–4.1:1, with (9–)12–21(–29) pairs of sporangia. Spores 30–40 µm in equatorial diameter, trilete, the muri often so broad that the lumina are reduced to conical pits, superficially smooth but always minutely undulate (sensuMurley in Stearn 1978).
Type location:
Derivation of specific name:
Habitat: High rainfall woodland on sandy soils, often overlying sheet-rock
Altitude range: 1500 m (approx)
Worldwide distribution: Tanzania, Zambia
Zambian distribution (Flora Zambesiaca): N
Zambian distribution (Provinces):
Growth form(s): Terrestrial.
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters: Display spot characters for this species

Burrows, J.E. & Johns, R.J. (2001). Ophioglossaceae Flora of Tropical East Africa Royal Botanic Gardens, Kew Pages 14 - 15.

Roux, J.P. (2001). Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report 13 Page 34.

Roux, J.P. (2009). Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands Page 35.

Other sources of information about Ophioglossum richardsiae:

External websites:

African Plants: A Photo Guide (Senckenberg): Ophioglossum richardsiae
BHL (Biodiversity Heritage Library): Ophioglossum richardsiae
EOL (Encyclopedia of Life): Ophioglossum richardsiae
GBIF (Global Biodiversity Information Facility): Ophioglossum richardsiae
Google: Web - Images - Scholar
iNaturalist: Ophioglossum richardsiae
IPNI (International Plant Names Index): Ophioglossum richardsiae
JSTOR Plant Science: Ophioglossum richardsiae
Mansfeld World Database of Agricultural and Horticultural Crops: Ophioglossum richardsiae
Plants of the World Online: Ophioglossum richardsiae
Tropicos: Ophioglossum richardsiae
Wikipedia: Ophioglossum richardsiae

Copyright: Mike Bingham, Annette Willemen, Bart Wursten, Petra Ballings and Mark Hyde, 2011-23

Bingham, M.G., Willemen, A., Wursten, B.T., Ballings, P. and Hyde, M.A. (2023). Flora of Zambia: Species information: Ophioglossum richardsiae.
https://www.zambiaflora.com/speciesdata/species.php?species_id=213390, retrieved 8 December 2023

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