624 PROCEEDINGS OF THE AMERICAN ACADEMY. 
Guadalupe y Calvo, alt. 2150 to 2300 m., Welson, no. 4853; near 
Colonia Garcia, 25 August, 1899, Nelson, no. 6097; near Casas Gran- 
das, 15 August, 1899, Townsend & Barber, no. 438. This species has 
been variously referred to C. scabiosoides HBK. and C. diversijolius 
Otto. From the former it is readily distinguished by its larger and 
much paler rays, yellow disk-flowers, and puberulent stem ; from the 
latter in having the stem puberulent instead of sparingly to copiously 
beset with longer hairs, also in having a firmer leaf-texture, a more 
leafy stem, ete. 
Cosmos scasrosorpes HBK. Nov. Gen. et Spec. iv. 242 (1820). 
This species presents leaf-forms so diverse that without the numer- 
ous transitions now known it would be difficult to believe them con-’ 
specific. The extremes are certainly so marked as to merit at least 
formal recognition. The typical form, described as having “ folia pu 
natipartita, foliolis aut laciniis quinque, sessilibus, lanceolato-oblongis, 
acutis, basi cuneatis, apicem versus subserratis,” was collected neat 
Patzeuaro in Michoacan, and appears to be exactly represented by 
Pringle’s no. 4263 from that locality. Differing markedly from this 
typical form are the following: : 
Forma indivisus, n. f., foliis indivisis integriusculis vel irregulaniter 
serratis lanceolatis vel lanceolato-ovatis. — Hills of Patzcuaro, Michoa- 
can, 11 October, Pringle, nos. 4263 in part, and 3589 in part ; in shady 
_ places near San Miguelito, San Luis Potosi, Schaffner, no. 200 ; on - 
Sierra Madre, Zacatecas, 18 August, 1897, Rose; near Santa Taresty 
Tepic, Rose, no. 3433; in the Sierra Madre, west of Balatios, Jalisco, 
Rose, no. 2957. Transitions to the typical form are frequent and re 
well illustrated by Purpus’s no. 1551 (Salto de Agua, Mexico) 1 which 
the lower leaves are undivided and the upper pinnatifid with lanceolate 
segments “4: 
Calea Peckii, n. sp., fruticosa scandens ; caule volubile teretl lig: 
noso lenticellis minutis prominulis scabro atrobrunneo oppositiramed ; 
foliis oppositis ovatis subintegris breviter petiolatis acutis 2-4 °™ 
longis 1-2.2 cm. latis basi subrotundatis 3-nerviis utrinque scabriusct 
lis quaamquam aspectu glabris subtus paulo pallidioribus aureo-atoni 
feris, petiolo gracili puberulo ca. 3 mm. longo; pedicellis in 
superioribus binis vel trinis ; inflorescentia fasciculiformi ve, 
biformi rotundata multicapitulata ; capitulis ca. 8 mm. xg 
homogamis ; involueri subcylindrici squamis valde inaequalibus ext 
oribus brevibus late ovatis puberulis ciliolatisque subherbacels ae 
minusve squarrosis, intermediis longioribus ovato-oblongis fete 
bus rubro-stria is, intimis anguste-lanceolatis laete flavis rubro- 
acutis ; corollis flavis aureisve involucrum. modice superantt 
‘ 
