Home Flora of Missouri
Home
Name Search
Families
Volumes
!Ophioglossum L. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in Index Nominum Genericorum (ING)Search in NYBG Virtual HerbariumSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font
 

Published In: Species Plantarum 2: 1062. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 7/9/2009)
Acceptance : Accepted
Project Data     (Last Modified On 8/5/2009)

 

Export To PDF Export To Word

2. Ophioglossum L. (adder's tongue)

Vegetative portion of the leaf simple, sessile or short-stalked, lanceolate to ovate in outline, the base wedge-shaped to cordate, sheathing the stalk of the fertile spike, the veins branched, copiously anastomosing. Fertile portion of the leaf an erect, long-stalked spike, the sporangia sunken into the axis of the spike, in 2 rows on opposite sides. Twenty-five to 30 species, nearly worldwide.

The species of Ophioglossum are probably more widespread in Missouri than present records indicate, as the plants are relatively inconspicuous and the leaves are only visible for a few months each year. The genus contains the highest chromosome numbers of the vascular plants (see O. vulgatum, below).

 

Export To PDF Export To Word Export To SDD
Switch to bracketed key format
1.Stems globose, cormlike
Ophioglossum crotalophoroides
1.Stems short-cylindrical, sometimes slightly thickened
2.Principal veins forming areoles that enclose thinner, anastomosing veins; sterile portion of the leaf often somewhat folded lengthwise, usually sharply pointed at the tip
Ophioglossum engelmannii
2.Veins all about the same thickness, forming a simple network, the areoles not enclosing thinner networks of veins; sterile portion of the leaf flat or somewhat concave, not folded, not sharply pointed at the tip
3.Leaves mostly 2–4 per stem, the tips of the sterile portions acute
Ophioglossum petiolatum
3.Leaves usually 1 per stem, the tips of the fertile portions rounded
Ophioglossum vulgatum
 
 
© 2019 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110