Evans: Notes on genus Herberta 219 



4. Herberta tenuis sp. nov. 

 Schisma juniperinum Sulliv. Muse. Alleg. 258. 1846. Not 



Dumort. 

 Sendtnera juniperina Sulliv.; A. Gray, Man. 689. 1848. Not 



Nees. 

 Herberta adunca Underw. Bot. Gaz. 14: 195. 1889. Not S. F. 



Gray. 



Yellowish or brownish green, rarely tinged with red, growing in 

 more or less extensive mats: secondary stems erect or ascending, 

 sparingly and irregularly branched, rigid, mostly 2-4 cm. long, 

 about 0.15 mm. (or ten cells) wide and 0.13 mm. (or nine cells) 

 thick, outer layer of cells with strongly thickened walls, interior 

 cells with slightly thickened walls: leaves scattered to loosely 

 imbricated, subsquarrose to slightly secund, a little unsymmetrical, 

 subovate, mostly 0.9-1 mm. long and 0.3-0.35 mm. wide, bifid 

 two thirds to three fourths, divisions (in explanate leaves), 

 divergent, slightly or not at all curved, long-acuminate, mostly 

 0.6-0.7 rnrn- long and 0.15-0. 18 mm. wude, margin entire or with 

 an occasional basal tooth; vitta distinct, extending far out into 

 the divisions but not to the apices, undivided portion about 

 0.1 mm. long and 1.5 mm. wide; cells of vitta mostly 20-55 X 14 m 

 in the basal portion and 20-35 X 14 m in the divisions, marginal 

 cells in the basal region about 14 m in diameter, in the divisions 

 about 17 /x, cells between margin and vitta about 20 ^; thickenings 

 distinct but not so strongly developed as in most species, in the 

 vertical walls mostly 3-4 /x wide; cuticle minutely striolate-ver- 

 ruculose: underl eaves similar to the leaves but symmetrical; 

 inflorescence unknown. [Text figs. 21-29.] 



The following specimens have been examined: 



New York: Kaaterskill Falls, Catskill Mountains, C. H. Peck 

 (listed by Peck, as Sendtnera juniperina, in Rep. New York State 

 Mus. Nat. Hist. 19 : 70. 1866 ; both " Cauterskill " Falls and High 

 Peak, Catskill Mountains, are mentioned here) ; Austin's Hep. 

 Bor.-Amer. 82, distributed as Sendtnera juniperina, is also H. 

 tenuis and may possibly include some of Peck's material, the label 

 reading: "Catskill Mountains, New York, Peck, Greenwood Mts., 

 N. J., Aust.; also in the Alleghanies southward." 



New Jersey: Greenwood Mountains, Passaic County, No- 

 vember, 1866, C. F. Austin (listed by Britton, as H. adunca, in 

 Cat. PI. New Jersey 351. 1889); Austin's Hep. Bor.-Amer. 82 

 (see above) is probably made up largely of material from this 

 locality. 



