1514 COXTRIBUTIOXS FROM THE NATIONAL HERBARIUM 



Teeth of the proper involucres ovate to triangular-lanceolate (rarely 

 lanceolate in no. 14). 



Stem and branches of inflorescence pubescent 13. N. liebmannii. 



Stem and branches of inflorescence essentially glabrous. 



14. N. palmeri. 



1. Nocca biiiora (Hemsl.) Kuntze, Rev. Gen. PI. 1: 354. 1S91, as Noccaea. 

 Ligascea biflorn Heaisl. Diag. PI. Mex. 33. 1879. 



Oaxaca; type from Mexico, without definite locality. 



Shrubby, pubescent; leaves petioled, ovate-lanceolate, 2. .5 to 5 cm. long, dentic- 

 ulate; involucres villous; corollas glabrous; achenes hirsute; paleae of pappus 

 subequal. (Description compiled.) 



2. Nocca helianthifolia (H. B. K.) Cass. Diet. Sci. Nat. 25: 104. 1822, as 



Xoccaea. 



Lagascea helianthifolia H. B. K. Nov. Gen. & Sp. 4: 25. 1820. 



Jalisco to Oaxaca; type from Acapulco, Guerrero. 



Suffrutescent (?), about 2.5 meters high, very leafy, branching in the inflores- 

 cence; stem glandular-puberulous, and spreading-hispid-pilose with mostly 

 deciduous hairs; leaves ovate or oblong-ovate, 6 to 21 cm. long, serrate, scabrous 

 above, scabrous or scabrid beneath; glomerules large, leafy-bracted; involucre 

 silky-villous, unequally dentate; corollas about 1.5 cm. long, "yellowish white." 

 2a. Nocca helianthifolia suaveolens (H. B. K.) Robinson, Proc. Amer. Acad. 

 36: 468. 1901. 



Lagascea suareolens H. Bt K. Nov. Gen. & Sp. 4: 25. 1820. 



Noccaea suaveolens Cass. Diet. Sci. Nat. 25: 105. 1822. 



Nocca lalifolia Cerv. in Llave & Lex. Nov. Veg. Descr. 1: 31. 1824. 



Lagascea lalifolia DC. Prodr. 5: 92. 1836. 



Lagascea helianthifolia suaveolens Robinson, Proc. Amer. Acad. 43: 38. 1907. 



Sinaloa to Veracruz and Oaxaca; type collected between Rio Papagallo and 

 Venta Colorada, Mexico. Guatemala and El Salvador. 



Similar; leaves often broader, softl}- pubescent beneath. "Lengua de vaca" 

 (El Salvador). 

 2b. Nocca helianthifolia adenocaulis (Robinson) Blake. 



Lagascea helianthifolia adenocaulis Robinson, Proc. Amer. Acad. 43: 38. 1907. 



Known only from the type locality, Uruapan, Michoacdn. 



Stem densely glandular-pul)erulous, without long hairs; leaves scabrous above, 

 tomentellous beneath. 

 2c. Nocca helianthifolia levior Robinson, Proc. Amer. Acad. 36: 468. 1901. 



Lagascea helianthifolia levior Robinson, Proc. Amer. Acad. 43: 38. 1907. 



Tepic to Michoacdn or Guerrero; type from Colima. 



Stem finely and densely puberulent, without long hairs or glands; leaves puberu- 

 lent beneath. 



3. Nocca media Blake, Contr. U. S. Nat. Herb. 22: 596. 1924. 



Known only from the type localitj', between Tixila and Chilpancingo, Guerrero. 



Herbaceous, at least above, finely hirtellous and sparsely hispid-pilose; leaves 

 ovate, 6 to 8 cm. long, the upper clasping, the lower narrowed to a subsessile, not 

 clasping base, scabrid on both sides; proper involucres silky-villous; corolla 

 about 10 mm. long. 



4. Nocca heteropappus (Hemsl.) Kuntze, Rev. Gen. PI. 1: 354. 1891, as 



Noccaea. 



Lagascea heteropappus Hemsl. Diag. PI. Mex. 33. 1879. 



Michoacdn; type from Mexico, without definite locality. 



Shrub 1 meter high; leaves ovate to elliptic, 4 to 7.5 cm. long, green above; 

 proper involucres silky-villous, with slender subulate teeth; pappus of 2 awns 

 and several squamellae. 



