basis of one collection which Liebmann made almost a 
century ago. The precise locality of this collection (Lieb- 
mann 14) is unknown, but Standley believed that it was 
‘*collected somewhere in southern Mexico, probably in 
Oaxaca or Vera Cruz’’. [t is very probable that the col- 
lection was made in northeastern Oaxaca—where Lieb- 
mann made some of his most extensive and valuable 
collections. Schultes & Reko 865 represents apparently 
the second collection which has been made of this rare 
species. 
An examination of the isotype of Parathesis tenuis 
which is in the Gray Herbarium indicates that it agrees 
strikingly in all details with Schultes & Rehko 865, On 
the basis of field notes and an examination of the num- 
erous specimens which constitute Schultes & Reko 865, 
the following amplified description and drawing of Par- 
athesis tenuis is offered. 
Arbor parva, tenuis, usque ad quindecim pedes alta. 
Folia alterna, elliptica, integra, valde et obtuse longe- 
acuminata, cuspidata. Petiolus 3-9 mm. longus, Inflo- 
rescentia terminalis, subcorymbosa, foliis brevior, paucos 
flores ferens; bracteae minutissimae, lineares, obtusae. 
Sepala elongato-triangularia, acutiuscula, basi connata, 
minute puberula, fulva. Petala lanceolata, acutiuscula, 
basi breviter connata, intus alba glandulosis cum pilis, 
extus circiter sex lineas latas ornata, anthesi explanata, 
apicibus valde reflexis antheras exhibentibus. Filamenta 
glabra. Antherae lineares, petalis breviores, aureae. Ovar- 
lum punctatum, puberulum, ovoideum. Stylus tenuis- 
simus, apice saepissime recurvatus, anthesi exsertus et 
persistens. Fructus ignotus. 
A small, slender tree up to 15 feet tall with weak, 
minutely brown-tomentulose branches. Leaves alternate, 
elliptic, strongly and obtusely long-acuminate, entire, 
cuspidate, cuneate at the base, thin, 3.5—-6 em. long, 1-2 
[ 188 | 
