黑心蕨 hei xin jue

Pteris concolor Langsdorff & Fischer, Pl. Voy. Russes Monde 19, t. 21. 1810; Allosorus concolor (Langsdorff & Fischer) Kuntze; Cheilanthes concolor (Langsdorff & Fischer) R. M. Tryon & A. F. Tryon; Pellaea concolor (Langsdorff & Fischer) Baker; Pteris cheilanthoides Hayata.

Rhizomes erect or ascending, short. Fronds monomorphic, clustered. Stipe reddish brown, shiny, 6-24 cm × 1-2 mm, rounded abaxially, shallowly grooved adaxially, with 1 U-shaped vascular bundle at base. Lamina green to yellowish green, pentagonal to elongate pentagonal, as long as wide, 4-8 cm, pedate-bipinnatisect to pedate quadripinnatisect, lacking proliferous buds, thin to relatively firm in texture, glabrous, base deeply cordate, apex of segments acute, bluntly to sharply pointed. Middle primary segment broadly rhombic, 3.5-5 × 2-4 cm, base broadly cuneate, decurrent along rachis. Lateral pair of pinnae deltoid, 3-4.5 × 2.5-3.5 cm, bases decurrent and connected to middle pinna with broad wings; basiscopic pinnules much longer than acroscopic ones, proximal basiscopic pinnule longest, pinnatipartite margins entire or slightly crenate, with a white or brown border. Veins free, obscure, free vein ends forming adaxial hydathodes. Sori along segment margins, interrupted at sinuses and segment tips. Spores yellow, rugulate. 2n = 60.

Terrestrial or on rocks, along streams, in forests or open areas; 200-900 m. Guangdong, Guangxi, Hainan, Taiwan [India, Malaysia, Sri Lanka, Vietnam; Africa, Australia, Caribbean islands, Central and South America, Madagascar, Mexico].