The Hypogymnia Species of North America

Hypogymnia duplicata

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

Overview

Synopsis: Trailing, slender, arcuate, nodulose lobes, and irregularly expanded lower surface; P+ orange red, K-, KC-.
Distribution: Coastal Alaska to Oregon; North American endemic.
Habitat: cool moist oceanic forests
Range: Pacific Northwest, Pacific Northwest Immediate Coast
Other Diagnostics: Pendulous cascade of arcuate lobes, irregularly expanded lower surface, absence of physodic acid
Substrate Notes: On conifers, rarely on hardwoods, rarely on rock or mossy rock
Abundance in North America: Locally common
Substrate: Typically
Host: Conifers
On Rock: Rarely
On Moss/Detritus/Sod: Never
Authority: (Ach.) Rass.
References: Krog (1968)
Synonymy: None
Hypogymnia duplicata - Habit
Habit

Vegetative Structures

Habit Appressed: Rarely
Habit Pendulous: Almost always
Habit Erect to Suberect: Rarely
Size (cm): Mean: 15 SD: 7.5
Upper Color- White to Greenish Gray: White to greenish gray
Upper Surface Brown when Solarized: Blackish or unknown
Dark Mottles: None or rare
Black Border: Conspicuous or not
Lobes Separated: Separate
Lobe Outline: Nodulose
Upper Surface Texture: Smooth
Branching: Isotomic dichot.
Budding: Occasional
Lobe Width (mm): Mean: 1 SD: 0.25
Lobe Tips, Axils, and/or Lower Surface Perforated: Never
Lobe Tips Perforated: Entire
Lower Surface Perforated: Sparsely perforate
Cavernulae: Never
Thallus Texture: Cartilaginous
Medulla: Almost always
Ceiling Color: Brownish to white
Floor Color: Dark
Hypogymnia duplicata - Habit
Habit
1/7
Hypogymnia duplicata - Lobe cavity
Lobe cavity
2/7
Hypogymnia duplicata - Habit
Habit
3/7
Hypogymnia duplicata - Habit
Habit
4/7
Hypogymnia duplicata - Lobe tip
Lobe tip
5/7
Hypogymnia duplicata - Habit
Habit
6/7

Reproductive Structures

Soredia: None
Schizidia: Rarely
Isidia: None
Lobules: None
Apothecia: Rare
Spore Length (µm): Mean: 6.5 SD: 0.25 Max: 7 Min: 6
Spore Width (µm): Mean: 5.25 SD: 0.125 Max: 5.5 Min: 5
Pycnidia: Common
Hypogymnia duplicata - Ascospores
Ascospores
1/2
Hypogymnia duplicata - Apothecia
Apothecia
2/2

Chemistry