634 NATURAL HISTORY OF PLANTS. 



7 ? Acicarpha J.^ — Flowers (of Calycera or Boopis) polygamous, 

 2-morphous, capituliform-glomerulate ; exterior glomerules of inflo- 

 rescence formed of fertile flowers; achenes crowned with concrete 

 foveoles of raised receptacle and persistent accrescent hard spinescent 

 lobes of calyx ; upper glomerules composed of sterile flowers ; 

 germens not changed after floration free. — Herbs generally annual, 

 ramose or procumbent, foliate ; leaves alternate, petiolate or sessile 

 amplexicaul, obovate, spathulate or subpinnatifid ; inflorescences 

 shortly pedunculate or sterile. {Extratrop, west, S, America, trop. 

 east, marit. Brazil.^) 



* Ann. Mus. ii. 347, t. 58, 1. — Cass. Diet. Sc. Soe. xii. 131. — Sommea Bokt, Ann. Gen. Sc. 



Nat. i. Suppl. 32.— Less. Linncea, vi. 527. — Phys. vi. 92, t. 87. — Acanthosperma Velloz. 



L.-C. Rich. Mem. Mus. vi. 78, t. 11.— DO. Fl. Flum. Atl. viii. t. 152 (not H. B. K.).— 



Frodr. v. 3 (part). — Endl. Gen^ n. 3036. — H. Echinolema Jacq. f. (ex Endl.). 



Bn. Payer Fam. Nat. 245.— B. H. Gen. ii. 162, 2 gpec. 3. Poir. Pict. Suppl. i. 110.— Miers, 



n. 3. — Cryptocarpha Cass. Bull. Soc. Philom. Ann. and May. Nat. Hist. (1869); Contrib.n. 



(1817); Pict. Sc. Nat. xii. 86.— Turp. Pict. 37, t. 51, 52 (part). 

 Sc. Nat. Atlas, t. 194.— R. Br. Trans. Linn. 



