634 PROCEEDINGS OF THE AMERICAN ACADEMY. 
apice curvatus, sub lente leviter bifidus. —Santa Eulalia Mountains, 
Chihuahua, April, 1885, Pringle, no. 133 (type, in hb. Gray), dis- 
tributed as H. costata Gray. Its nearest affinity is with H. plicata 
Torr. From this species it is at once distinguished by the color of the 
foliage and shape of the leaf-base. Hedeoma costata Gray, based upon 
Ghiesbreght’s no. 815, was obscurely published in the Synoptical Flora 
in 1878 (Vol. II, Part II, p. 363), and thus has priority over Hemsley’s 
H. costata, published in the Biologia Centrali-Americana. This is in- 
deed fortunate, for although Hemsley’s description was drawn up 
from Ghiesbreght, no. 815, the first specimen which he cited, Palmer, 
no. 1095, from Chihuahua, is clearly the more recently published 
H. Pringlei Briq. (including H. permizta Briq.). True H. costata is 
represented in the Gray Herbarium by only the type specimen from 
Chiapas, and is doubtless a species of strictly southern range. Speci- 
“mens which have been distributed under the name are for the most part 
H. plicata Torr., a species which, to judge from the material at hand, is 
confined to the arid region of northern Mexico and the southwestern 
United States. 
Hedeoma quinquenervata, n. sp. Herba perennis ca. 2 dm. alta, 
ubique cano-pubescens, caulibus e basi lignosa numerosis, sparsim 
ramosis vel simplicibus. Internodia media 3-4cm. longa. Foliorum 
laminae usque ad 12mm. latae, 18 mm. longae, basi obtusae, apice 
obtusiusculae vel acutae, margine leniter revolutae, subargute 10-12- 
denticulatae, exigue punctatae, utrinque permanenter pubescentes, 
supra virides, subtus pallidiores, nervis alterutrinque 5(-6), ad denticu- 
lorum apices terminantibus, solum subtus prominulis. Petioli usque 
5-6 mm. longi. Verticillastri plerumque 7-flori axillares m caule 
summo aggregati, folia bractiforma occultantes, pedunculis usque ad 
2mm. longis. Pedicelli 4-6 mm. longi. Bracteolae omnes unitormes 
pedicellis multo breviores lineares. Calyx maturus 9mm. longus 
eylindricus antice levissime gibbosus, intus a pilorum annulo 
obseptus, valde nervosus ; labri dentibus aristiformibus leviter meutv® 
tis quam eis labioli divergentibus vix longioribus. Corolla 18mm. 
longa extus minute puberula, e basi tenui sursum gradatim ampliate, 
labro oblongo apice truncato emarginato ; labiolo trilobo, lobis laterali- 
bus semiovatis, medio oblongo apice trancato. Stamina antica fertilia 
tubo summo inserta vix labioli lobos superantia, duo postica 1 mm. longa 
longe infra alia inserta, antheras capitatas nec polliniferas gerenta. 
Stylus nudus integer. — Sierra Madre, Monterey, State of Nuevo i 
Pringle, no. 10,241 (type, in hb. Gray). A species most closely 
to Hedeoma tenella Hemal., but differing in the nervation of the leaves, 
the more profuse and persistent pubescence, and the larger flowers 
