184 PROCEEDINGS OF THE AMERICAN ACADEMY. 



UMBELLI FERAE. 



Apium, L. 



A. laciniatum, Urb. in Mart. Fl. Bras. xi. pt. 1, 343 (1879). 

 Helosciadium laciniatum, DC. Mem. Soc. Phys. Genev. iv. 495 (1828) ; 

 Hook. f. (3), 215; Anderss. (1), 2L9, & (2), 92. — Charles Isl. : 

 Darwin, ace. to Hook, f., 1. c. Further distrib. Peru to Chili. 



A. leptophyllum, F. Muell. ace. to Benth. Fl. Austr. iii. 372 (1866). 

 A. Ammi, Urb. in Mart. Fl. Bras. xi. pt. 1, 341, q. v. for extensive 

 synon. Helosciadium leptophyllum, DC. Mem. Soc. Phys. Genev. iv. 

 493 (1828) ; Hook. f. (3), 215 ; Anderss. (1), 219, & (2), 92. — Albe- 

 marle Isl. : Iguana Cove, Snodgrass & Heller, no. 41 (hb. Gi\). 

 James Isl. : Darwin. Further distrib. N. Am , Mex., S. Am., Austral., 

 etc. 



Centella, L. 



C. asiatica, Urb. in Mart. Fl. Bras. xi. pt. 1, 287 (1879). Hydro- 

 cotyle asiatica, L. Sp. 234 (1753). H. repanda, Pers. Syn. i. 302 

 (1805); Caruel (1), 623. — Chatham Isl.: Chierchia, ace. to Caruel. 

 Further distrib. N. Am., S. Am., Asia, etc. 



Hydrocotyle, L. 



H. galapagensis, nov. sp., glaberrima, repens, radicibus ad nodos 

 fibrosis petiolis erectis teretibus, foliis orbicularibus peltatis prope centrum 

 insertis 12-13-radiati-nervatis, margine duplo dentata, nervis venulisque 

 transluceutibus, pedunculis erectis, umbellis simplicibus sub ,16-floribus 

 non proliferis : involucris bracteis ovatis brevibus pedicellis flores quadri- 

 quintuple excedeutibus : calycis limbo obsoleto, petalibus ovatis obtusis 

 patentibus, albis, fructu latiori quam longo basi rotundato vel subcordato. 

 H. umbellata, Rob. & Greenm. (1), 146, not L. — Chatham Isl. ; 

 southwest end, upper region, Baur, no. 150 (lib. Gr.). Near H. umbel- 

 lata, L., which it resembles rather closely in habit, flowers, and fruit, the 

 leaves, however, differ rather conspicuously by their doubly dentate not 

 crenate margin from the Linnaean species. Transitional forms have been 

 sought in vain in material of H. umbellata from many other parts of the 

 world. 



Petroselinum, Koch. 



P. sativum, Hoffm. Gen. Umb. 177 (1814) ; Anderss. (1), 219, & 

 (2), 92. Apium Petroselinum, L. Sp. 264 (1753). Carum Petrose- 



