PlantNET Home PlantNET Home | Search NSW Flora | Contact Us  
FloraOnline
Introduction
Plant Name Search
Index Search
Spatial Search
Identification Keys
Classification
Glossary
HerbLink (Type Images)
WeedAlert
Other PlantNET Sites
Other Data Sources
NEW SOUTH WALES FLORA ONLINE Printable Page

Isoetes drummondii subsp. anomala C.R.Marsden & Chinnock
Family Isoetaceae
Isoetes drummondii subsp. anomala C.R.Marsden & Chinnock APNI*

Description: Annual plant; corm small, usually 2 or (3)-lobed, to 10 mm wide.

Leaves to 30, spirally arranged, erect or recurved, 3–13 (-30) cm long, 1–2 mm diam., acute, bright green; base to 20 mm wide, broadly winged, very dilated, bases of the outer leaves completely covering the bases of the inner ones, white; peripheral fibre strands 2–4, rarely with small accessory ones; stomata present distally; internal hairs absent; trans-lacunar diaphragms visible; ligule triangular-cordate, 1–2 mm long; labium small.

Sporangia naked, not covered by a velum, round to obovate or elongate-elliptic, c. 5 mm diam.; wall opaque, shiny, dark brown; megaspores irregular, large, often 0.5 mm diam., Type III with only a few Type I; proximal and distal faces tuberculate; tubercles often coalescing into short irregular cristae, drying white; microspores not known.


Herbarium
Sheet

Distribution and occurrence: Found in south-eastern S.A. and Vic., with isolated populations in southern N.S.W. (rare south from Goulburn) and south-western W.A.

In shallow water or mud.
NSW subdivisions: ST, SWS
Other Australian states: Vic.
AVH map***

"Type I megaspores: almost spherical, nucleate and containing large quantities of fats, oils and other storage products; usually fertile. Type III megaspores: irregular, dumbbell-shaped, usually appearing like parts of two type I megaspores joined together by one or more tubular connections; probably binucleate and containing storage products; possibly fertile."

Text by E.A. Brown
Taxon concept: Flora of Australia 48


APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
  Privacy | Copyright | Disclaimer | About PlantNET | Cite PlantNET