Physciaceae

Heterodermia leucomelos, from here.
Belongs within: Lecanoromycetidae.

The Physciaceae are a family of lichenised fungi associated with green algae, often found growing on nitrogen-rich substrates.

Characters (from Cannon & Kirk 2007): Thallus crustose, foliose or fruticose. Ascomata apothecial, sessile, occasionally immersed, usually with a distinct margin. Interascal tissue composed of ± branched and anastomosing paraphyses, often with swollen and/or pigmented apices. Asci with a J+ apical cap, with a conical or funnel-shaped more weakly staining apical cushion, usually with a J+ gelatinized outer layer. Ascospores usually septate, usually dark brown with thickened walls and septa. Anamorphs pycnidial.

<==Physciaceae
    |--Amandinea EB03
    |--Anaptychia ciliaris EB03, RS99
    |--Australiaena EB03
    |--Awasthia EB03
    |--Dermatiscum EB03
    |--Dermiscellum EB03
    |--Dimelaena EB03
    |--Diploicia EB03
    |--Diplotomma EB03
    |--Dirinaria EB03
    |--Hafellia EB03
    |--Hyperphyscia EB03
    |--Mischoblastia EB03
    |--Mobergia EB03
    |--Phaeophyscia EB03
    |    |--P. decolor (Kashiwadani) Essl. 1978 [=Physcia decolor Kashiwadani 1975] S03
    |    `--P. hispidula J87
    |--Phaeorrhiza EB03
    |--Physciella EB03
    |--Physconia EB03
    |--Pyxine EB03
    |--Redonia EB03
    |--Rinodina EB03
    |--Rinodinella EB03
    |--Santessonia namibensis EB03, E99
    |--Tornabea EB03
    |--Buellia EB03
    |    |--*B. disciformis E99
    |    `--B. aethalea E99
    |--Gassicurtia EB03
    |--Physcia EB03
    |    |--P. aipolia E99
    |    |--P. alba J87
    |    |--P. caesia F33
    |    `--P. tribacia F33
    `--Heterodermia EB03
         |--H. chondroidea Web. & Awasthi 1971 S03
         |--H. circinalis J87
         |--H. comosa J87
         |--H. diademata BB05
         |--H. japonica BB05
         |--H. leucomelos J87
         |    |--H. l. ssp. leucomelos J87
         |    `--H. l. ssp. boryi J87
         `--H. lutescens J87

Nomen illegitimum: Buellia parasema E99

*Type species of generic name indicated

REFERENCES

[BB05] Banik, D. & P. Bujarbarua. 2005. Lichens on Agapetes D. Don ex G. Don (Ericaceae) in India. Bulletin of the Botanical Survey of India 47 (1-4): 59-62.

Cannon, P. F., & P. M. Kirk. 2007. Fungal Families of the World. CABI.

[E99] Eriksson, O. E. (ed.) 1999. Notes on ascomycete systematics. Nos 2440-2755. Myconet 2: 1-41.

[EB03] Eriksson, O. E., H. O. Barah, R. S. Currah, K. Hansen, C. P. Kurtzman, G. Rambold & T. Laessøe (eds.) 2003. Outline of Ascomycota – 2003. Myconet 9: 1-89.

[F33] Frey, E. 1933. Cladoniaceae (unter Ausschluss der Gattung Cladonia), Umbilicariaceae. In Die Flechten (Dr. L. Rabenhorst’s Kryptogamenflora von Deutschland, Österreich und der Schweiz vol. 9) sect. 4, part 1. Akademische Verlagsgesellschaft M. B. H.: Leipzig (reprinted 1971. Johnson Reprint Corporation: New York).

[J87] Judd, W. S. 1987. Floristic study of Morne La Visite and Pic Macaya National Parks, Haiti. Bulletin of the Florida State Museum – Biological Sciences 32 (1): 1-136.

[RS99] Rossman, A. Y., G. J. Samuels, C. T. Rogerson & R. Lowen. 1999. Genera of Bionectriaceae, Hypocreaceae and Nectriaceae (Hypocreales, Ascomycetes). Studies in Mycology 42: 1-248.

[S03] Sinha, G. P. 2003. Additions to the lichen flora of India from Sikkim. Bulletin of the Botanical Survey of India 45 (1-4): 221-224.