Cheilanthes bonariensis

(Willdenow) Proctor

Bull. Inst. Jamaica, Sci. Ser. 5(1): 15. 1953.

Common names: Bonaire lip fern
Basionym: Acrostichum bonariense Willdenow Sp. Pl. 5: 114. 1810
Synonyms: Notholaena aurea (Poiret) Desvaux
Treatment appears in FNA Volume 2.

Stems short-creeping to compact, usually 4–8 mm diam.; scales bicolored, with broad, well-defined, dark, central stripe and narrow, light-brown margins, narrowly lanceolate, slightly contorted, strongly appressed, persistent. Leaves clustered, 10–60 cm; vernation noncircinate. Petiole dark-brown, rounded adaxially. Blade linear, pinnate-pinnatifid throughout, 1–4 cm wide; rachis rounded adaxially, lacking scales, with dense monomorphic pubescence. Pinnae articulate at swollen, hirsute nodes, basal pair slightly smaller than adjacent pair, ± equilateral, appearing hirsute adaxially. Costae absent. Ultimate segments elongate-deltate to ovate, not especially beadlike, the largest 1–7 mm, abaxially densely tomentose, adaxially hirsute. False indusia marginal, weakly differentiated, 0.05–0.25 mm wide. Sori ± continuous around segment margins. Sporangia containing 32 spores. n = 2n = 90, apogamous.


Phenology: Sporulating summer–fall.
Habitat: Rocky slopes and ledges, found on a variety of substrates though rarely observed on limestone
Elevation: 1200–2400 m

Distribution

V2 360-distribution-map.gif

Ariz., N.Mex., Tex., Mexico, West Indies, Central America, South America

Discussion

Cheilanthes bonariensis has been assigned to Notholaena in past treatments. It is distantly related (at best) to the species here included in Notholaena, however, and we concur with R. M. Tryon and A. F. Tryon (1982) that it should be transferred to Cheilanthes. Chromosomal studies (G. J. Gastony and M. D. Windham 1989) suggest that C. bonariensis is an apogamous triploid that arose through autopolyploidy. Further investigation is necessary to determine whether 64-spored, sexually reproducing populations of C. bonariensis are still extant.

Selected References

None.

Lower Taxa

None.
... more about "Cheilanthes bonariensis"
Michael D. Windham +  and Eric W. Rabe +
(Willdenow) Proctor +
slightly smaller than adjacent pair +
cuneate +, truncate +  and rounded +
Acrostichum bonariense +
scaly rarely glabrous adaxially pubescent +  and glabrous +
pinnate-pinnatifid +
1cm;4cm +
Bonaire lip fern +
Ariz. +, N.Mex. +, Tex. +, Mexico +, West Indies +, Central America +  and South America +
1200–2400 m +
0.005 cm0.05 mm <br />5.0e-5 m <br /> (0.025 cm0.25 mm <br />2.5e-4 m <br />) +
yellow +  and white +
obcordate;reniform +
Rocky slopes and ledges, found on a variety of substrates though rarely observed on limestone +
monomorphic +
clustered;widely scattered +
recurved +  and reflexed +
noncircinate +  and circinate +
10 cm100 mm <br />0.1 m <br /> (60 cm600 mm <br />0.6 m <br />) +
light-brown +
persistent +
lanceolate +
swollen +
glabrous +, scaly +  and pubescent +
Sporulating summer–fall. +
Bull. Inst. Jamaica, Sci. Ser. +
persistent +
linear-subulate +  and ovatelanceolate +
yellowish +, brown +  and black or gray +
cristate +  and tetrahedral-globose +
dark colored +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
ascending +  and horizontal +
Notholaena aurea +
Cheilanthes bonariensis +
Cheilanthes +
species +
0.1 cm1 mm <br />0.001 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0 cm0 mm <br />0 m <br /> (?) +  and 0.4 cm4 mm <br />0.004 m <br /> (?) +
crescent--shaped +  and roundish +
branched +  and anastomosing +