56 Contributions from the Gray Herbarium 
triplo superantibus flexuoso-intricatis; ovarium subglobosum 
parum compressum ca. 0.5 mm. longum; stylus brevissimus, 
stigmata ad 0.4 mm. longa. Fl. 6 desunt.— Oaxaca: Rio 
Concordia, Dept. Pochutla, 600 m., 23 April 1917, Conzatti, Reko, 
& Makrinius 3194 (typ in Gray Herb.). — The species, which is 
very distinct in characters of foliage and inflorescence, is dedicated 
to the well-known Mexican naturalist, Professor Alfonso L. 
Herrera, Director of Biological Studies in Mexico. Only the panicle 
and apex of the stem and two of the stem leaves have been 
examin 
IrestNE laxissima Blake, sp. nov. Caulis herbaceus tenuis 
hexagonus viridis papillosus glaber, ramulis novellis canescenti- 
pilosis. Folia saepius opposita ovata vel lanceolata acuminata 
basi cuneata vel rotundata integra tenuia supra juventate appresse 
pilosa maturitate sparse (in costa et margine subdense) appresse 
puberula subtus in costa sparse puberula margine ciliolata ceterum 
subglabra pennivenia (venis ca. 7-jugis subtus prominentibus) 
4-6§.5 em. longa 1.5-2.4 em. lata, in petiolis subnudis pilosis 4-6 
mm. longis. Rami florigeri axillares laxe patentes vel curvati 
usque ad 2 dm. longi glabri angulati nudi basi ramosi, ramulis 1.3 
dm. longis vel brevioribus, spicis 3-7 mm. longis 2-3 mm. diametro. 
Bracteae suborbiculari-ovatae breviter (ca. 0.05 mm.) acutato- 
mucronulatae scariosae basi ima pilosae 0.8 mm. longae; brac- 
teolae similes ad apicem 1-nerviae longius mucronatae (mucrone 
ca. 0.15 mm. longo) basi pilosae 1.4 mm. longae. Flores perfecti 
1.7 mm. longi; sepala oblongo-ovalia apice obtusa vel rotundata 
et parum cucullata 3-nervia viridescenti-scariosa basi pilosa, pilis 
sepala aequantibus vel dimidio longioribus; stamina 5, filamentis 
basi in annulum connatis, staminodiis nullis; ovarium turbinato- 
subglobosum; stigmata stylum duplo superantia. Semen brun- 
nescens 0.7 mm. diametro.— Oaxaca: Rio Concordia, Dept. 
Pochutla, 600 m., 23 April 1917, Conzatti, Reko, & Makrinius 3166 
(Type in Gray Herb). — Related to I. angustifolia Euphrasén 
(see Standley, N. Am. Fl. xxi. 157), but with obsolete staminodia, 
much shorter acumina to the bracts, and obtuse sepals. 
Amyris Rekoi Blake, sp. nov. Arbor vel frutex glaberrimus; 
rami tenues glabri cortice canescenti-brunneo lenticellato tectl, 
novelli obscure virides glabri. Folia alterna unifoliolata, foliole 
lanceolato-ovato acuminato basi cuneato vel cuneato-rotundato 
