22 Contributions from the Gray Herbarium 
with suberect lobes. The lobes, however, are rounded, the throat 
of the corolla is appendaged and the aspect of the plant is more sug- 
gestive of Lithospermum than of Onosmodium. But L. revolutum 
has the aspect of Onosmodium, which fact, taken together with its 
corolla-characters seems to justify its classification as a member of 
that genus rather than of Lithospermum. 
MAacroMERIA EXSERTA D. Don, var imparata, var. nov., cauli- 
bus adpresse strigillosis; pilis haud patentibus; aliter formae 
typicae simillima. — Mexico: Oaxaca, 1842, Ghiesbreght (TYPE, 
Gray Ears: )e 
This variety is not furnished with the rigid widely spreading 
hairs which are so abundant on the stems of the typical form of the 
species with which it otherwise agrees. 
Lith um, spec. nov., ut videtur herbaceum 7.5 
dm. altum eaten a in schedulis) ; caulibus superne 2-3-cho- 
tomis adpresse strigillosis et hispidis; foliis caulinis superioribus 
ovato-lanceolatis acuminatis basi abrupte acutis 4-6 cm. longis 
fructiferis incurvatis circa 5 mm. longis et sabveis tadintis 10 mm 
longis linearibus hispidis et strigosis; corolla alba circa 15 mm. 
longa, tubo circa 12 mm. longo extus et intus adpresse piloso et 
facies glandulari-granulosis; limbi lobis rotundatis minute 
crenulatis; nuculis laevissimis haud punctatis. — Mexico: Cerro 
Verde, near the bounda ary between Michoacan and Guerrero, Nov. 
6, 1898, Langlassé, no. 581 (Typn, Gray Herb.); hills, Uruapan, 
Michoacan, Nov. 15, 1905, Pringle, no. 13761. 
This species is apparently related to L. Nelsonii Greenm. but 
the resemblance is mostly one of aspect rather than of agreement in . 
technical characters. The presence of pubescence within the 
corolla tube, the absence of appendages in the throat and the 
crenulate corolla lobes are a few of the distinctive features of 
L. chersinum. 
