Heterodermia podocarpa (Bél.) D.D.Awasthi

Family :

Physciaceae

D. Awasthi, Geophytology 3: 114. 1973.  

Basionym: Parmelia podocarpa Belanger in C. Belanger & M. Bory de Saint-Vincent,  Voy. Ind. Orient. Bot. II, Crypt.: 122. 1840

ID :

BU/BRL/2022/014

Thallus :

Foliose to sub fruticose, forming small rosettes or irregularly spreading, adnate to loosely adnate, 2–5 cm wide

Lobes :

0.5–3.0 mm wide, sublinear, convex, irregularly branched, suberect or ascending at the apices, partially imbricate, discrete to contiguous, ciliate, with whitish simple cilia 1–2 mm long scattered along the margins, not mat-forming

Upper Side:

Grayish white or gray, epruinose

Isidia :

Soredia and Isidia absent

Lower Side :

Ecorticate, arachnoid, ±canaliculate, whitish. Rhizines simple or irregularly branched, whitish, 1–2 mm long

Medulla :

White 

Common, substipitate to stipitate, 1–5 mm wide, subterminal on ascending lobes; margin crenate or with well-developed squamules, eciliate; disc brown to dark brown, often white-pruinose

Apothecia :

Polyblastidia-type, ellipsoidal, with 2 or 3 small sporoblastidia, 36–51 × 17–25 μm. Pycnidia common, immersed, then becoming emergent, visible as black dots; conidia bacilliform, 4–5 × 1 μm

Ascospores :

Cortex K+ yellow, C–, KC–, P+ yellow; medulla K+ yellow then red, C–, P+ orange; yellow pigment on lower surface K+ violet; containing atranorin (major), zeorin (major), 6α-acetoxyhopane-16β,22-diol (minor), 6α-acetoxy-16β,22-dihydroxyhopane-25-oic acid (trace), leucotylin (trace), norstictic acid (major), connorstictic acid (minor)

Chemistry :