— 34 — 
Apothecia common, marginal, concave at length convex, marginate (max. diam. 
5 mm.), disk buff. Spores ellipsoid, curved (rarely a few substraight), 
Contingent Phases: Unobserved. 
Substrata: Trees. 
Distribution: Common in the Austral Zone. 
Stations : F lorid a : 
Jacksonville; Snake Key. 
Texas: Corpus Christi. 
Bermuda. Santo Domin- 
go. St. Croix Island: 
Christiansted. Jamaica: 
Malvern Hill; Mandeville. 
Observations: This 
species, distinguished large- 
ly by its striate and pa- 
pillate thallus, was recog- 
nized by Tuckerman, who 
included Ramalina denticulata in his description. Nylander recognized denti- 
culata of Eschweiler as a distinct species largely on chemical grounds, and 
his deeply canaliculate variety canalicularis he distinguished on the same 
grounds. R. complanata and denticulata grow together, as proved by material 
before me collected in Bermuda, and cannot be separated except chemically,, 
and the positions of the papillations are not at all characteristic, as they 
occur scattered over the surface and alone on the margins in plants giving the 
same reactions. It, moreover, is a character that we would hardly suppose to 
be constant. The somewhat smaller spores attributed to denticulata do not 
agree with those of plants distinguished on chemical grounds. The species is 
always distinguished by its compressed, papillate thallus. 
Note: Ramalina fastigiata var. lacerata Mull. Arg. Flora 74:373. 1891. 
This variety appears to be more nearly related here than with fastigiata. It was 
described from “Mexico prope San Luis Potosi” (type. no. 1025 Parry et Palmer ) 
as follows: “thallus dense caespitosus, circ. ‘pollicaris’; rami superne subpec- 
tinatim lacero lacinuligeri, costato-inaequalis et sublaeves et majores hinc inde 
parce et minute albido-tuberculligeri.” 1 . c. 
Note: Ramalina denticulata (Eschw.) Nyl. Eschw. Flora Brasil. 1 : 221. 
1833 . 
The type locality is “arborum ad ripam fluvii Amazonum.” This species,, 
which except for its chemical reaction is inseparable from complanta, is included 
under the foregoing species. Though in most instances where the reactions 
differ, there are to be found correlated differentiating morphological characters, 
in this case no constant diagnostic points of separation have been discovered in 
the material examined. 
This species was described as follows: “thallo caespitoso cartilagineo foliaceo 
erecto, e laciniis lineari-elongatis subdichotomis utrinque olivaceis longitudin- 
aliter rugosis et lineatis margine aspero-denticulatis, scutellis subtetminalibus. 
concavis, disco rubro et carneo-pruinoso.” 1 . c. 
Fig. 1 — Distribution of Ramalina complanata and 
denticulata . 
