'34 



FIELD COLUMBIAN MUSEUM BOTANY, VOL. III. 



CALEA L. Sp. PL, Ed. 2:1179. 



Heads heterogamous, radiate, ray flowers pistillate, fertile, or 

 achenes abortive, ligulate; disk flowers perfect, fertile, tubular; or 

 heads homogamous, rays wanting. Involucre ovoid or wide cam- 

 panulate of dry bracts, imbricated in several series, appressed, outer 

 gradually shorter. Receptacle conic or convex, chaffy; scales con- 

 cave, embracing the disk flowers. Achene subcompressed laterally, 

 base attenuate; pappus of 5-20 scarious, narrow, rigid scales. Peren- 

 nial herbs or shrubs. 



Pappus of oblong scales 1.5 mm. long 

 Pappus of linear scales 3.5-4 mm. long 



Zacatechichi. 

 axillaris urticifolia. 



Calea Zacatechichi Shlecht. Linnsea, 9:589. 



A much branched shrub, with terete, subglabrate or brown pubes- 

 cent stem and branches, and opposite, short-petioled, thick, ovate, 

 acute, 3-nerved, reticulate-veined, coarsely crenate-serrate (or upper- 

 most entire) leaves, hispid on the upper surface. Inflorescence of 

 few-flowered, irregular cymes 

 terminating the numerous upper 

 branches; branchlets and pe- 

 duncles brown glandular-pubes- 

 cent. Heads 10 mm. high, 5-6 mm. 

 broad, about 12 flowered. In- 

 volucral bracts closely appressed 

 in 4-6 series, broad, obtuse, the 

 outer successively shorter more 

 or less glandular-puberulent, the 

 inner faintly striate. Ray flow- 

 ers none, corollas of disk flowers 

 yellow, deeply 5 cleft. Recep- 

 tacle short-conoid ; scales cune- 

 ate, acute, 3-5 dentate, deciduous 

 with the achenes, loosely enfold- 

 ing them. Achenes dark brown, .7x2.8 mm., oblong-conoid with 

 attenuate, suboblique base; in section elliptical; clothed on the sides 

 with long, fragile, jointed hairs, dorsum and ventrum glabrate or 

 nearly so; pappus of 12-15 stramineous plumose-laciniate, oblong 

 scales 1.2-1.7 mm - 



Hab. Nohpat, Nov. 24, 1865, Schott 912. 



Called TZICIN, "unraveled," by the Mayas. 



Calea urticifolia (Mill.) D. C. Prod. 5:674. 



Solidago urticifolia Mill. 



Shrubby, with terete stem and branches, brownish villous, at least 

 when young, and opposite, short-petioled, rather thick, lanceolate-ovate, 

 acuminate, prominently veiny, crenate leaves, scabrate above, pubes- 

 cent below. Inflorescence of few-flowered, irregular cymes, terminal 

 and axillary; branchiets and peduncles slender, brown pubescent. 



