PART 1

17. Containing argopsin agg.; ascospores 7-12 × 2.5-3 µm;
Wakulla County ...................................................P. buettneri var. glauca (B. de Lesd.) Brako
17. Containing pannarln, phyllopsorin and zeorin; ascospores
10-12 × 2.5-3 µm; reported by Brako from Louisiana,
not yet found in Florida.................................................. [P. buettneri var. munda (Malme) Brako]
NOTES
Phyllopsora buettneri (Müll. Arg.) Zahlbr. var. glauca (B. de Lesd.) Brako
This variety of P. buettneri has not been reported from North America previously. The specimen was
determined by Lois Brako.
FLORIDA. Wakulla County: Swamp forest, Lost Creek at Forest Service Rd. 309, just S of Leon County
line, 4 Dec 1988, Harris 23375 (NY).
PARMELIACEAE Zenker
KEY TO THE GENERA
1. Thallus foliose; central strand absent ..................................................................................................................................................... 2
2. Lobes ciliate on margins or in axils...................................................................................................................................................... 3
3. Cilia not swollen at base ................................................................................................................................................................... 4
4. Lobes broad, 4-20 mm wide; cilia usually conspicuous ............................................................................................................... 5
5. Underside pale at margin, black in center, with only one type of rhizine ................................................................................. 6
6. Cortex not or only weakly maculate, not or only slightly cracked;
rhizines lacking in marginal zone; chemistry various......................................................................................... Parmotrema
6. Cortex maculate and abundantly cracked; rhizines usually reaching margin;
salazinic acid .............................................................................................................................................................. Rimelia
5. Underside uniformly pale to medium brown, with numerous short rhizines
and fewer long ones ; Florida species isidiate; rare (previously
included in Parmotrema) ......................................................................................................................................... Rimeliella
4. Lobes narrow, 0.5-6.0 mm wide; cilia inconspicuous................................................................................................................... 7
7. Medulla yellow, especially below soralia, C+ yellow (pigments, terpenoids);
soralia pustular, breaking down to form coarse soredia; south to Seminole County..................................................................
................................................................................................................................Myelochroa aurulenta (Tuck.) Elix & Hale
7. Medulla white, C+ pink (gyrophoric or hiasic acid complex) ............................................................................. Parmelinopsis
3. Cilia swollen at base (bulbate) ......................................................................................................................................................... 8
8. Cortex gray (atranorin) ................................................................................................................................................. Bulbothrix
8. Cortex yellow (usnic acid) ................................................................................................................................................ Relicina
2. Lobes not ciliate on margins or in axils................................................................................................................................................ 9
9. Thallus not pseudocyphellate......................................................................................................................................................... 10
10. Cortex or medulla yellow.......................................................................................................................................................... 11
11. Lobes narrow, 0.5-6.0 mm wide.......................................................................................................................................... 12
12. Cortex yellow (usnic acid) ............................................................................................................................................... 13
13. Growing on bark; thallus pustulate; pustules breaking down
to form coarse soredia; divaricatic acid; south to Lake
County................................................................................................................ Parmeliopsis subambigua Gyelnik
13. Growing on sandstone; isidiate; stictic acid agg.; known only from
Rock Hill, Washington County, new to Florida ......................................Xanthoparmelia conspersa (Ach.) Hale
36