62 PROCEEDINGS OF THE AMERICAN ACADEMY. 



fertilibus 6-9 cm. longis, amentis maturis 3-5 oblongo-cylindricis atro- 

 brunneis pedunculatis 7-14 mm. longis 5-7 mm. diametro ; nuculis 

 cuneato-obovatis vel suborbicularibus rufobrunneis lucidis 1.5-2 mm. 

 longis. — Mountains about Cima Station, Mexico, alt. about 3000 m., 

 30 August, 1905, C. G. Pr Ingle, no. 10,040 (type, in hb. Gray). Re- 

 sembling large-leaved A. jorullensts HBK., but quite lacking the close 

 covering of waxy or granular atoms which characterizes the lower leaf- 

 surface of that species. 



Alnus Pringlei Fernald, n. sp., arbor parva ; ramis ramulisque 

 angulatis, juventissimis cinereo-puberulis mox glabratis ; foliis late 

 elliptico-ovatis 4.5-9 cm. longis 3-7 cm. latis apice breviter acuminatis 

 basi rotundatis, marginibus regularibus vel paulo sinuatis crebre serru- 

 latis, venis subtus prominentibus rufescentibus pilosis; petiolis 0.5-1 

 cm. longis piloso-ciliatis ; ramis floriferis elongatis ; amentis ^ 4-7 

 terminalibus anthesi 5-6 cm. longis ; pedunculis fructiferis 2 valde di- 

 vergentibus crassis ; amentis $ 3-4 sessilibus maturitate cylindricis 

 2.2-2.7 cm. longis 0.9-1.1 cm. diametro atrobrunneis ; nuculis crassis 

 late cuneatis et angulatis 2.5-3 mm. longis obscuris pallide brunneis. — 

 By streams, near Uruapan, Michoacan, Mexico, alt. about 1525 m., 13 

 November, 1905, C. G. Pringle, no. 10,125 (type, in hb. Gray). Most 

 nearly related to A. acuminata HBK., which has larger oblong-ovoid 

 ashy-brown strobiles 1.5 cm. thick, and larger thick-winged lustrous 

 nutlets. 



Euphorbia ariensis HBK., var. villicaulis Fernald, n. var. Eume- 

 canthus Benthamianus Kl. & Garcke, in Kl. Tricocc. 42 (1860), not 

 Euphorbia Benthami Hiern, Cat. Welw. Afr. PI. i. 943 (1900). Eu- 

 phorhia ariensis Benth., PI. Hartw. 51, no. 387 (1840), not HBK. 

 Nov. Gen. et Sp. ii. 57 (1817). Caulibus in parte inferiore valde vil- 

 losis ; foliis quam eis formae typicae aliquid latioribus ; inflorescentia 

 laxiore. — In pine forests at Corn Station, Michoacan, Mexico, alt. 

 1970 m., 29 October, 1905, C. G. Pringle, no. 10,116 (type, in hb. 

 Gray). This locality is only about 48 km. to the west of Patzcuaro, 

 which was Hartweg's original station. 



Heliotropium calcicola Fernald, n. sp., frutex gracilis 6-15 dm. 

 altus ; cortice brunneo exfolianti ; ramulis albido-strigoso-puberulis ; 

 foliis lanceolatis utroque atten uatis breviter petiolatis apice mucronatis 

 cum pilis minntis et lucidis utrinque obtectis 2-4.5 cm. longis 

 3-10 mm. latis margine revolutis ; spicis terminalibus et lateralibus 

 geminis 0.5, maturitate usque ad 2, cm. longis; pedunculis gracilibus 

 1.3-2 .cm. longis canescentibus ; calyce 1.5-2.5 cm. longo cum pilis 

 minutis adpressis canescenti, lobis lanceolatis ; corolla anguste urceo- 

 lata 3 mm. longa adpresse setulosa, lobis ovatis acuminatis ; stylo nullo ; 



