The Hypogymnia Species of North America

Hypogymnia krogiae

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

Overview

Synopsis: Imbricate lobes with isotomic dichotomous branching, sometimes perforate at the tips, lobe cavity with white or dark ceiling and dark floor; medulla K-, KC+ orange red, P+ orange red.
Distribution: Endemic to eastern North America where it is common in the mountains. Map in Ohlsson (1973): Eastern N Am, Tenn, N. Car, to Quebec and New Brunswick.
Habitat: high elevation conifer forest
Range: Eastern North America
Abundance in North America: Locally common
Substrate: Typically
Host: Abies, Picea
On Rock: Never
On Moss/Detritus/Sod: Never
Authority: Ohlsson
References: Ohlsson (1973)
Synonymy: None
Hypogymnia krogiae - Habit
Habit

Vegetative Structures

Habit Appressed: Sometimes
Habit Pendulous: Never
Habit Erect to Suberect: Commonly
Size (cm): Mean: 8 SD: 4
Upper Color- White to Greenish Gray: White to greenish gray or brown
Upper Surface Brown when Solarized: Dark brown
Dark Mottles: None or rare
Black Border: Not visible
Lobes Separated: Contiguous to imbricate
Lobe Outline: Even to nodulose
Upper Surface Texture: Smooth
Branching: Isotomic dichot.
Budding: Occasional
Lobe Width (mm): Mean: 1.25 SD: 0.375
Lobe Tips, Axils, and/or Lower Surface Perforated: Sometimes
Lobe Tips Perforated: Sometimes perforate
Lower Surface Perforated: Entire
Cavernulae: Never
Thallus Texture: Cartilaginous
Medulla: Almost always
Ceiling Color: White or dark
Floor Color: Dark
Hypogymnia krogiae - Lobe cavity
Lobe cavity
1/8
Hypogymnia krogiae - Habit
Habit
2/8
Hypogymnia krogiae - Habit
Habit
3/8
Hypogymnia krogiae - Perforate lobe tips
Perforate lobe tips
4/8
Hypogymnia krogiae - Lobes
Lobes
5/8
Hypogymnia krogiae - Lobes
Lobes
6/8
Hypogymnia krogiae - Habit
Habit
7/8

Reproductive Structures

Soredia: None
Schizidia: Rarely
Isidia: None
Lobules: Occasional
Apothecia: Common
Spore Length (µm): Mean: 6.9 SD: 0.2 Max: 7.3 Min: 6.5
Spore Width (µm): Mean: 5.05 SD: 0.225 Max: 5.5 Min: 4.6
Pycnidia: Common
Hypogymnia krogiae - Lobules
Lobules
1/2
Hypogymnia krogiae - Ascospores
Ascospores
2/2

Chemistry