The Hypogymnia Species of North America

Hypogymnia minilobata

Click on Characteristic name for explanation. Click on image for larger version.

Overview

Synopsis: Small thallus with subcontiguous swollen lobes with dark interiors and perforate tips and axils; always P-.
Distribution: coastal S Cal and Channel Islands
Habitat: coastal sage scrub
Range: Central and Southern California
Other Diagnostics: Small thallus with subcontiguous swollen lobes with dark interiors and perforate tips and axils; always P-. Spores may be more elongate than in H. occidentalis.
Substrate Notes: On conifers and hardwood trees and shrubs, especially chaparral shrubs
Abundance in North America: Locally common
Substrate: Typically
Host: Conifers and hardwood trees and shrubs
On Rock: Never
On Moss/Detritus/Sod: Never
Authority: McCune & Schoch
References: McCune & Schoch (2009)
Synonymy: None
Hypogymnia minilobata - Habit
Habit

Vegetative Structures

Habit Appressed: Almost always
Habit Pendulous: Never
Habit Erect to Suberect: Rarely
Size (cm): Mean: 4 SD: 2
Upper Color- White to Greenish Gray: White to greenish gray
Upper Surface Brown when Solarized: Blackish or unknown
Dark Mottles: Sometimes present
Black Border: Sometimes present
Lobes Separated: Contiguous to +/- separate
Lobe Outline: Pinched and swollen
Upper Surface Texture: Becoming rugose
Branching: Variable
Budding: Present
Lobe Width (mm): Mean: 1.6 SD: 0.45
Lobe Tips, Axils, and/or Lower Surface Perforated: Almost always
Lobe Tips Perforated: Perforate
Lower Surface Perforated: Rarely perforate
Cavernulae: Never
Thallus Texture: Cartilaginous
Medulla: Almost always
Ceiling Color: Dark
Floor Color: Dark
Hypogymnia minilobata - Lobes
Lobes
1/12
Hypogymnia minilobata - Lower surface
Lower surface
2/12
Hypogymnia minilobata - Lobes
Lobes
3/12
Hypogymnia minilobata - Lobes
Lobes
4/12
Hypogymnia minilobata - Lobes
Lobes
5/12
Hypogymnia minilobata - Perforate lobe tips
Perforate lobe tips
6/12
Hypogymnia minilobata - Habit
Habit
7/12
Hypogymnia minilobata - Perforate lobe tips
Perforate lobe tips
8/12
Hypogymnia minilobata - Lobes
Lobes
9/12
Hypogymnia minilobata - Perforate lobe tips
Perforate lobe tips
10/12
Hypogymnia minilobata - Lobes
Lobes
11/12

Reproductive Structures

Soredia: None
Schizidia: Rarely
Isidia: None
Lobules: Occasional
Apothecia: Common
Spore Length (µm): Mean: 6.75 SD: 0.375 Max: 7.5 Min: 6
Spore Width (µm): Mean: 4.35 SD: 0.325 Max: 5 Min: 3.7
Pycnidia: Common
Hypogymnia minilobata - Apothecia
Apothecia
1/2
Hypogymnia minilobata - Ascospores
Ascospores
2/2

Chemistry