38 PEOCEEDINGS OF THE AMERICAN ACADEMY. 



fuscis basi callosis, pappi setis ca. 22 aequalibus tenuibus laete albis 5 

 mm. longis vix scabratis. — On mountains, Saltillo, Mexico, alt. 2135 

 m., 5 October, 1905, C. G. Pringle, no. 10,082 (tjq^e, inhb. Gray). 



Lagascea helianthifolia HBK., var. adenocaulis Robinson, 

 n. var., caule (3-4 m. alto) usque ad summam partem dense glandu- 

 loso-puberulo nee piloso ; foliis longiuscule oblanceolato-oblongis at- 

 tenuatis supra scabris subtus paulo pallidioribus molliter tomentellis. — 

 Hedgerows, Uruapan, Micboacan, Mexico, 24 January, 1907, C. G. 

 Pringle, no. 13,907 (type, in bb. Gray). A transition between this 

 variety and the typical spreading-pilose form is shown by L. C. Smith's 

 no. 964 from the mountains of San Juan del Estado, Oaxaca. 



Lagascea helianthifolia HBK., var. levior Robinson, n. comb. 

 Noma helianthi folia Cass., var. levio7- Robinson, Proc. Am. Acad, 

 xxxvi. 468 (1901). 



Lagascea helianthifolia HBK., var. suaveolens Robinson, n. 

 comb. L. suaveolens HBK. Nov. Gen. et Spec. iv. 25 (1820)' Nocca 

 helianthifolia Cass., var. suaxeolens Robinson, 1. c. 



Lagascea Palmeri Robinson, n. comb. Nocca Palmeri Robinson, 

 1. c. 471 (1901). 



Lagascea Pringlei Robinson, n. comb. Nocca Pringlei Robinson, 

 1. c. 469 (1901). 



Guardiola Palmeri Robinson, n. sp., glaberrima atroviridis com- 

 pacte ramosa foliosa 3.5 dm. alta basi lignescens ; caulibus teretibus 

 striatulis gracilibus, ramis oppositis ascendentibus ; foliis oppositis 

 petiolatis ovatis vel subreniformibus integerrimis vel plus minusve 

 repandis nee angulatis nee dentatis 1.5-3 cm. longis 1.2-2.8 cm. latis 

 utrinque leviter reticulato-venosis subtus vix pallidioribus apice rotun- 

 datis basi late cordatis, petiolo 5-7 mm. longo ; inflorescentiis in api- 

 cibus ramorum folioso-bracteosis 1-3-capitulatis ; pedicelHs 3-7 mm. 

 longis ; capitulis 12-14 mm. longis 6-8 mm. diametro ; involucri sub- 

 cylindrati fusoo-viridis 1 cm. longi 4-5 mm. crassi squamis oblongis 

 obtusiusculis striatulis leviter convexis nullo modo carinatis ; radiis 

 ca. 3 ; corollae tubo gracili glaberrimo 5 mm. longo, ligula elliptica 

 4 mm. longa 2.2 mm. lata bidentata alba; achaeniis immaturis con- 

 cavo-convexis obovato-oblongis 4.6 mm. longis glabris ; floribus disci ca. 

 10 gracillimis, tubo corollae ca. 9 mm. longo, faucibus brevissimis 

 campanulatis, lobis limbi 5 lineari -oblongis obtusis recurvatis albis ; 

 filamentis albis tomentosis quam antherae virides multo brevioribus. — 

 Outer circle of mesas, Otinapa, Durango, Mexico, alt. about 2450 m., 

 25 July-5 August, 1906, Dr. E. Palmer, no. 377 (type, in hb. Gray). 

 This species in its few scattered heads, broad clearly petiolate leaves, 

 and unkeeled involucral scales, closely approaches G. Rosei Robinson ; 



