167. Teloschistes ] 43. BUELLIACEAE 365 



4. Teloschistes ramulosus Tuck., Syn. N. A. Lich. 1:51. 1882. 



Physcia parietina var. ramulosa Tuck., Proc. Am. Acad. 4:387. 1860. Xanthoria 

 ramulosa (Tuck.) Herre. 



Thallus yellow to yellowish gray, composed of minute, scattered, sparingly 

 branched, semi-cylindrical, slightly ascending, finally imbricated lobules ; ashy yellow 

 below, bearing scattered rhizoids; apothecia minute, 0.3-0.8 mm. across, subsessile, 

 the disk concave to flat, yellowish orange, the exciple thick, colored like the thallus, 

 entire; hypothecium hyaline; spores ellipsoid, 12-17X6-9 /a. 



On trees and shrubs, along the coast of California. 



5. Teloschistes chrysophthalmus (L.) Beltr., Lich. Bass. 109. 1858. 

 Lichen chrysophthalmus L., Mant. PI. 2:311. 1771. 



Thallus tufted, erect or spreading or more rarely pendulant, greenish gray to 

 yellow, composed of rigid, compressed, more or less fibrillose, dichotomously 

 branched lobes ; yellowish or grayish below, sometimes reticulately veined ; apothe- 

 cia small to middle-sized, 1-5 mm. across, terminal or subterminal, the disk concave 

 to flat, orange, the exciple thin, colored like the thallus, more or less ciliate; hypo- 

 thecium hyaline; spores ellipsoid, 10-16 X 5-8 ft. (Plate 44.) 



On trees and old wood, throughout the United States. 



6. Teloschistes flavicans (Swartz) Norm., Nyt Mag. Naturv. 7:229. 1853. 

 Lichen flavicans Swartz, Fl. Ind. Occ. 147. 1788. T. chrysophthalmus var. 



flavicans (Swartz) Tuck. T. exilis (Michx.) Vainio. 



Thallus tufted, erect and spreading or rarely pendulant, yellowish orange to 

 yellow or ashy, composed of many elongated, entangled, somewhat compressed, 

 more or less twisted, pitted or channeled, minutely whitish or yellowish soredi- 

 ate branches; apothecia small to middle-sized, 1-2.5 mm. across, lateral, scattered, 

 the disk concave to flat, dark orange, the exciple thin, colored like the thallus, 

 becoming crenulate, sometimes disappearing ; hypothecium hyaline ; spores ellipsoid, 

 12-18 X 6-10 /a. 



On trees, from Massachusetts to Florida, and in Texas, California, Nevada, 

 and Oregon. 



7. Teloschistes villosus (Ach.) Norm., Nyt Mag. Naturv. 7:229. 1853. 



Parmelia villosa Ach., Meth. Lich. 254. 1803. Physcia villosa (Ach.) Duby. 



Thallus ashy gray, erect and spreading or pendulant, composed of many com- 

 pressed, channeled, much-divided, more or less entangled, minutely hispid branches ; 

 apothecia small to middle-sized, 1-2.5 mm. across, subterminal, subsessile, the disk 

 concave, yellowish red or orange, the exciple thin, colored like the thallus, more 

 or less ciliate; hypothecium hyaline; spores oblong-ellipsoid, 11-15 X 4.5-6 /x. 



On trees, southern California. 



8. Teloschistes euplocus (Tuck.) Zahlbr., in E. & P., Nat. Pfl. U^O. 1907. 

 Physcia euploca Tuck., Am. Journ. Sci. II. 25:424. 1858. Speerschneidera euploca 



(Tuck.) Trev. 



Thallus erect or suberect, dichotomously much-branched, pale brownish to 

 whitish, the branches short, slender, interwoven, forked or pointed at the apices; 

 apothecia small to middle-sized, 0.5-1.2 mm. across, sessile, the disk flat to convex, 

 flesh-colored to brownish, the exciple thin, colored like the thallus, becoming wavy 

 and sometimes disappearing; hypothecium hyaline to yellowish; paraphyses simple 

 or little branched; asci clavate; spores ellipsoid to ovoid-ellipsoid, 10-15 X 3.5-5 jx. 



On rocks, Texas, Missouri, and Kansas. 



43. BUELLIACEAE 



Thallus crustose to scaly, or rarely squamulose, entire or lobed at the margin, 

 showing little or no differentiation into layers, attached to the substratum by hyphal 

 rhizoids; apothecia round, immersed to adnate or sessile, with a well-developed 

 proper or thalloid exciple. 



The algal host is Protococcus. 



