240 ROBINSON. 
This is the plant which has in recent years been passing as E. 
Muelleri Sch. Bip., the identity of which is discussed below. 
The plant here described as E. choricephalum, although for many 
years well represented in herbaria, appears never to have been char- 
acterized. Dr. Gray evidently glimpsed the plant as a separable 
entity and gave it a manuscript name as a variety of E. grandidentatum 
DC., but he may have lost confidence in it or altered his conception of 
E. Gfandidentatim (which has subsequently proved a synonym of the 
older E. pazcuarense HBK.), for he never published a description of 
this variety. 
Dr. Gray’s varietal name, laxiflorum, notwithstanding its morpho- 
logical inaccuracy, as well as its lack of characterization and conse- 
quently negligible nature, would have been here taken up in the 
specific rank, except for the circumstance that it would have necessi- 
tated making Pringle’s no. 747 the type of the species, since it would 
have been the type of the name-bringing synonym. It happens, 
however, that this particular number, while pretty clearly conspecific 
with the others here referred to the new species, is by no means central 
or typical among them, being in fact a little firmer in general texture 
and having slightly more rigid pedicels. It therefore seems ill-fitted 
to function as the type of the group (otherwise pretty uniform) in 
which it seems a trifle exceptional. 
E. (§ Cylindrocephala) chrysostictum, spec. nov., scandens vel 
in frutices vicinos incumbens 3-3.6 m. altum perenne vel fruticosum 
subglabrum, caule tereti laevi; internodiis 8 cm. vel ultra longis; 
foliis oppositis petiolatis ovatis caudato-acuminatis basi rotundatis 
margine revolutis subintegris (denticulis minimis obscuris callosis ca. 
5-7 mm. distantibus instructis) usque ad 10 cm. longis 5 em. latis a basi 
3-nerviis et cum nervulis intramarginalibus undulatis munitis supra 
laevissimis lucentibus laete viridibus subtus vix pallidioribus glabris 
cum punctis aureis numerosis translucentibus instructis, venis inter 
costas subregulariter transientibus; petiolo gracili 1-1.5 cm. longo 
glabro; panicula 3-4 dm. longa 1.5-2 dm. diametro foliaceo-bracteata 
oppositiramea; ramis ens Ca. 8-10-capitulatis, pedicellis pleris- 
que I cm. longis patentibus paul apillosis; capi- 
tulis ca. 12 mm. altis ca, sie 7mm. diametro; involucri cylindriei 
9mm. alti squamis ca. 37 oblongis 3-5-nerviis obscure ciliolatis apice 
rotundatis mucronulatis stramineis apicem versus viridescentibus; 
corollis albis vel pallide purpureis glabris 6 mm. longis graciliter 
tubulosis a basi ad limbum plerumque 4-dentatum sensim ampliatis 
sine faucibus distinctis; achaeniis 3.5 mm. longis gracilibus deorsum 



