36 PROCEEDINGS OF THE AMERICAN ACADEMY 



Gymnolomia Greggii. Fruticosa, tomento brevissimo incana ; 

 foliis plerisque oppositis ovatis obtusis integerrimis basi cuneatis in 

 petiolum brevem attenuatis subtus argenteis supra pube miuuta tan turn 

 cinereis (majoribus pollicaribus) ; capitulis ramulos corymbiformes 

 terminantibus ; involucri bracteis 3-serialibus gradatim imbricatis 

 oblongis acutiusculis siccis canescentibus ; ligulis 8-10 oblongis ; corollis 

 disci basi ampliatis apicem ovarii glabri calyptratim tegentibus. — 

 Northern part of Mexico, Dr. Gregg, 1848-49. No. 382 of the 

 present collection. The flowers of the ray are sterile, but there is 

 sometimes a rudimentary style. There is, as in most of the species, 

 no trace of a pappus. 



Zexmenia gnaphalioides. Floccoso-lanata, ramosa ; ramis 

 virgatis elongatis e basi vel caule lignescente apice longe nudo mono- 

 cephalis ; foliis parvis (lin. 6-9 longis) deltoideo-ovatis vel cordato 

 lanceolatis breviter petiolatis integerrimis margine demum revolutis 

 supra pube brevi sericeo-hispidula cinereis subtus tomento pannoso 

 incanis ; capitulo subgloboso (semipollicem lato) ; involucro bracteis 

 foliaceis fulcrato et e bracteis propriis coriaceis oblongis obtusissimis 

 adpressis gradatim pauciseriatim imbricatis, intimis linearibus papyra- 

 ceis ; ligulis oblongis ; acheniis hispidulis nunc exalatis nunc ala 

 crassa cinctis ; pappo inter aristas subulatas achenium oequantes 

 utrinque 3-4-squamellato, squamellis linearibus vel subulatis, majori- 

 bus aristis dimidio brevioribus. — Collected by Dr. Palmer on the 

 journey between San Luis and Tampico, only the flowering branches 

 of a most remarkable species, nearly past blossoming. No. 1106. 



Perymenium parvifolium. Suffruticosum, pube adpressa sca- 

 brida subcinereum ; caulibus gracillimis laxis brachiato-ramosis apice 

 longe nudo subumbellatim oligocephalis ; pedicellis filiformibus ; foliis 

 fere concoloribus oblongo-lanceolatis utrinque obtusis leviter trinerviis 

 integerrimis ( \-\ poll, longis) brevissime petiolatis ; involucro (lin. 2 

 longo) pauciseriali ; ligulis 7-9 oblongis ; paleolis pappi 2 (in radio 3) 

 elongatis aristiformibus caeteris fere setiformibus brevibus, omnibus 

 hispidis. — On the edge of ravines near San Luis, in dense clumps, 

 August. No. 475. 



Perymenium tenellum. Herbaceum, hispidulum ; caulibus diffu- 

 sis spithamceis ; foliis fere concoloribus oblongis ovalibusve obtusis 

 basi acutiusculis brevi-petiolatis pauci-dentatis triplinerviis pauci- 

 venosis parvis (lin. 5-9 longis) ; pedunculis 1-3 ex apice eaulis 

 elongatis filiformibus monocephalis ; involucro biseriali (lin. 3 longo), 

 bracteis exterioribus 5-6 herbaceis oblongis interiores membranaceas 

 angustiores paullo superantibus ; paleis receptaculi subulato-cuspi- 



