''Hiya'' is a genus of ferns belonging to the family
Dennstaedtiaceae
Dennstaedtiaceae is one of fifteen families in the order Polypodiales, the most derived families within fern, monilophytes (ferns). It comprises 10 genera with ca 240 known species, including one of the world's most abundant ferns, ''Pteridium aq ...
. Described in 2018, it resembles ferns of the genus ''
Hypolepis'' but differs from it by multiple characteristics: scrambling, indeterminate and intermittent growth of
frond
A frond is a large, divided leaf. In both common usage and botanical nomenclature, the leaves of ferns are referred to as fronds and some botanists restrict the term to this group. Other botanists allow the term frond to also apply to the lar ...
s;
stipule
In botany, a stipule is an outgrowth typically borne on both sides (sometimes on just one side) of the base of a leafstalk (the petiole (botany), petiole). They are primarily found among dicots and rare among monocots. Stipules are considered part ...
-like
pinnules at the base of
pinnae, and a
rachis
In biology, a rachis (from the [], "backbone, spine") is a main axis or "shaft".
In zoology and microbiology
In vertebrates, ''rachis'' can refer to the series of articulated vertebrae, which encase the spinal cord. In this case the ''rachi ...
-
costa architecture where the
adaxial sulcus of the rachis is continuous with that of the costae and costules.
The name of the genus references the name given to imperial guards from the
Qing dynasty
The Qing dynasty ( ), officially the Great Qing, was a Manchu-led Dynasties of China, imperial dynasty of China and an early modern empire in East Asia. The last imperial dynasty in Chinese history, the Qing dynasty was preceded by the ...
of China, ''hiya'', due to the prickly or very rough armed stipes present in the ferns.
Classification
, the following species are accepted in the genus as currently circumscribed by the Checklist of Ferns and Lycophytes of the World:
*''
Hiya brooksiae'' (= ''
Hypolepis brooksiae'' = ''Hypolepis celebica'' )
*''
Hiya distans'' (= ''Hypolepis distans'' )
*''
Hiya nigrescens'' (= ''Hypolepis nigrescens'' = ''Hypolepis hispanolica'' = ''Dennstaedtia rubicaulis'' )
*''
Hiya scabristipes'' (= ''Hypolepis scabristipes'' )
References
Dennstaedtiaceae
Fern genera
{{Polypodiales-stub