Cladoniaceae
Creators: name: Yánez-Ayabaca, A.
name: Ahti, T.
name: Bungartz, F.
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Fungi
Ascomycota
Lecanoromycetes
Lecanorales
Cladoniaceae

description: Key to species of the Cladoniaceae in the Galapagos Islands  1. Primary thallus granulose, evanescent, never squamulose; podetia generally 4–12 cm tall, always densely branched, typically forming cushions or mats (“reindeer lichens”), always ascyphose, lacking soredia, granules or microsquamules............................................................................................................................................................................ 2  
- Primary thallus squamulose, generally persistent, rarely evanescent; podetia present or not, if present, usually 1–3 (– 5) cm tall, simple or branched, scyphose or blunt; commonly sorediate, granulose or microsquamulose................... 5  
 2. Main thallus corticate, not originating from ascocarpous hyphae (pseudopodetia), with ellipsoid perforations, deep brown or pale yellowish brown, 4–5 cm tall....................................................................................... Cladia aggregata   
- Main thallus ecorticate or with discontinuous cortex, originating from ascocarpous hyphae (true podetia), lacking perforations, whitish gray or yellowish gray, not distinctly brown, typically> 5 cm tall............................................ 3  
 3. P+ orange red (fumarprotocetraric acid); podetia apically branched, with brownish to blackening necrotic tips; pycnidia with red jelly......................................................................................................................................... C. arcuata   
- P– (fumarprotocetraric acid absent); podetia apically branched, but tips ±concolorous with the podetia; pycnidial hyaline jelly never red.................................................................................................................................................. 4  
 4. Principal axes clearly differentiated because of their anisotomic branching pattern; ramifications dichotomous, rarely trichotomous, generally sparsely branched.......................................................... C. arbuscula subsp. boliviana   
 - Principal axes indistinct because of their isotomic branching pattern; ramification principally trichotomous, very rarely also dichotomous, densely branched.................................................................................................. C. confusa a. Podetia yellowish to greenish gray, with usnic acid........................................................ C. confusa f. confusa b. Podetia ash gray with brownish gray tips, lacking usnic acid......................................... C. confusa f. bicolor   
5. Podetia absent; primary thallus dominant.................................................................................................................... 6  
- Podetia present; primary thallus persistent, but not dominant..................................................................................... 8  
 6. Medulla C+ green (strepsilin)..................................................................................................................... C. strepsilis   
- Medulla C− (strepsilin absent)..................................................................................................................................... 7  
 7. Squamules thick, short, laciniate; surface rugulose, often cracked, typically epruinose, rarely pruinose; lower side not cottony, always lacking soredia..................................................................................................... C. corymbosula
description: Published as part of Yánez-Ayabaca, A., Ahti, T. & Bungartz, F., 2013, The Family Cladoniaceae (Lecanorales) in the Galapagos Islands, pp. 1-33 in Phytotaxa 129 (1) on page 3, DOI: 10.11646/phytotaxa.129.1.1, http://zenodo.org/record/5085561