ROBINSON: CONTRIBUTIONS FROM GRAY HERBARIUM. 251 
floribus circa 25 involucro multo superantibus ; corollis (verisimiliter 
albidis) 5 mm. longis anguste tubulosis sine faucibus ampliatis, limbo 
dentibus 5 brevibus patentibus consistente ; achaeniis nigris glabris 
3 mm. longis basi plus minusve attenuatis, pappi setis circa 15 flaves- 
centibus.— Guatemala: near Nenton, alt. 900 to 1200 m., &. W. 
Nelson, 17 December, 1895, no. 3517 (type in hb. Gr.). 
Of the affinity of Z. collinum, DC., and E. Neaeanum, DC., but 
readily distinguished from them by ttre pinnately nerved and strongly 
reticulate-veiny leaves of rounder contour. The type was distrib- 
uted as /. plectranthifolium. 
E. MyGINDAEFOLIUM, Gray, Proc. Am. acad., xvi, 101 (1881). 
Add synonym Bigelovia oppositifolia, Gray, Proc. Am, acad., xv, 
32 (1880). The identity of these species seems to be perfect. 
E. laurifolium, spec. nov. Lignosum vel lignescens alte scan- 
dens, ramis gracilibus striatis obscure angulatis glabrescentibus virid- 
ibus lenticellis parvis sparsis scabridis; foliis oppositis ovalibus 
obscure undulato-dentatis vel integris utrinque glabris minute retic- 
ulato-rugulosis et obscure pellucido-punctatis circa 12 cm. longis, 
5 cm. latis apice cau lato-acuminatis basi acutis, nerviis 5, duabus 
nerviis exterioribus prope basi orientibus mediam partem folii non 
attingentibus duabus nerviis lateralibus interioribus supra basim 
orientibus validioribus fere ad apicem percurrentibus, petiolis graci- 
libus supra canaliculatis 1.5 em. longis; capitulis in panicula pedun- 
culata oppositiramea sordide pubescenti bracteata dispositis, involucri 
squamulis rigidiusculis circa 4-seriatim imbricatis ovali-oblongis valde 
striatis concavis praeter marginem ciliatum glabris; corollis 5 mm. 
longis anguste tubulosis sine faucibus conspicuis, limbi dentibus 5 
angustis lanceolatis acutiusculis; achaeniis immaturis 2 mm. longis 
pubescentibus, pappi setis cirea 35 sordide flavescentibus simplici- 
bus laevibus 5-6 mm. longis.— Costa Rica: on hills near the Rio 
Chirripé, January, 1900, H. Pittier, no. 16,065 (type specimens in 
hb. Gr. and hb. Inst. fisico-geograf. San José, Costa Rica). 
This species is obviously related to E. populifolium, but it is 
clearly distinct from that species, differing in both the form and 
nervation of the leaves as well as in minor particulars 
E. nemorosum, Klatt, in Engl. Jahrb., viii, 35 (1887). To the 
description of this very distinct species of Klatt the following sup- 
plementary characters may be added :— Caule atropurpureo breviter 
glanduloso-pubescenti internodiis perlongis ; foliis penninervatis cau- 
