STANDLEY TREES AND SHRUBS OF MEXICO 1527 



Suffruticulose, about 15 cm. high, much branched, cinereous-strigose through- 

 out; leaves opposite, short-petioled, the blades lanceolate, 1 to 2.4 cm. Ipng, 

 3 to 6 mm. wide, few-toothed or entire; heads solitary at tips of branches, 1.5 

 cm. wide, often leafy-bracted; rays yellow, sessile, persistent; disk purple-brown; 

 ray achenes trigonous, stiffly 3-awned; disk achenes compressed, usually with 

 crustaceous margins and 2 short awns. 



48. HELIOPSIS Pers. Syn. PI. 2: 473. 1807. 

 1. Heliopsis longipes (A. Gray) Blake, Contr. U. S. Nat. Herb. 22: 608. 1924. 



Philactis longipes A. Gray, Proc. Amer. Acad. 15: 35. 1879. 



San Luis Potosi. 



Suffrutescent, 30 to 50 cm. high, hirtellous; leaves opposite, remote, short- 

 petioled, the blades ovate, about 2 cm. long, dentate-serrate; peduncles terminal, 

 elongate, 1-headed; involucre 2-seriate, about 7 mm. high, of subherbaceous, 

 ovate or lance-ovate phyllaries; receptacle columnar; flowers yellow; rays fertile, 

 the lamina sessile, about 1 cm. long, the achenes trigonous-obcompressed, epap- 

 pose; disk flowers fertile, quadrangular and few-ribbed, epappose or with 2 or 4 

 minute teeth. 



49. GRYPOCARPHA Greenm. in Sarg. Trees & Shrubs 1: 145. pi. 73. 1903. 



Reference: Blake, Contr. Gray Herb. n. ser. 52: 34-36. 1917. 



Shrubs with opposite triplinerved ovate leaves; heads yellow, radiate, solitary 

 in the axils or in cymes of 3 or 5 at tips of branches; involucre 2 or 3-seriate, the 

 phyllaries indurate, lance-ovate or oblong, with narrow, spreading or reflexed, 

 herbaceous tips; pales stiff, acuminate, usually incurved-hooked at apex; ray 

 corollas sessile, persistent; ray achenes trigonous, 1-awned; disk achenes fertile, 

 quadrangular, with 1 or 2 awns and sometimes 1 or 2 very short squamellae. 



The genus includes only the three following species. 



Branchlets densely pubescent; involucre villous 1. G. hebeclada. 



Branchlets very sparsely strigillose or glabrous; phyllaries ciliate, on back 

 sparsely pubescent or subglabrous. 



Veins of the leaves beneath spreading-pubescent 2. G. liebmannii. 



Veins of the leaves beneath glabrous 3. G. nelsonii. 



1. Grypocarpha'_ hebeclada Blake, Contr. Gray Herb. n. ser. 52: 35. 1917. 

 Oaxaca; type from Tula. 



Leaf blades ovate, 4 to 6.5 cm. long, strigose above, in j^outh densely pubescent 

 beneath, on petioles 1 cm. long; heads 1.5 to 3 cm. wide. 



2. Grypocarpha liebmannii (Klatt) Blake, Contr. Gra}- Herb. n. ser. 52: 35. 



1917. 

 Zinnia liebmannii Klatt, Leopoldina 23: 89. 1887. 

 Sanvitaliopsis liehmannii Schultz Bip.; Klatt, Leopoldina 23: 89. 1887, as 



synonym. 

 Melanthera fruticosa T. S. Brandeg. Univ. Calif. Publ. Bot. 10: 421. 1924. 

 Oaxaca (?) and Chiapas; type from Rio Taba, Oaxaca (?). Guatemala. 

 Leaf blades ovate, 7.5 to 10.5 cm. long, acuminate, smooth above; heads 2 cm. 

 wide. 



3. Grypocarpha nelsonii Greenm. in Sarg. Trees & Shrubs 1: 145. pi. 73. 1903. 

 Sanvitaliopsis nelsonii Greenm. Proc. Amer. Acad. 41: 261. 1905. 



Known only from the type locality, on ridge back of TonaM, Chiapas. 

 Leaf blades ovate, 6 to 7 cm. long, glabrous on both sides; heads about 2.2 cm. 

 wide. 



