I UK PHANEROGAMS OK THE JUAN FERNANDEZ ISLANDS 161 



a hybrid origin. It is certainly one of the very rarest plants in the island. 

 Still, no proofs that it is a bastard can be given at present. 

 The following figures illustrate the intermediate position: 



Number 



Numl ? cr . ot of in- involucral Size of bracts, Size of sepals, V'! 8 



t f eth " 1 vomeral leaves, mm mm (jtst - vlc - 



leaves , ' mm I11U1 mm 



leaves mm 



E. bupleuroides 

 E.fernandezianum 

 E. inaccessum 



8— 18(10 — n) 10— 12 10—20X3 3,5—4X1,5—2 2—2,5X1 — 1,2 6 



5—9 (6—7) 16—18 20x4—) 5X1,5—22,5—3 X 1,5—1,7 4,5— 5 



1- 4 (2—3) 18-23 20—25x4-5 7—^X2-3 5-3,5X1,5-2 5—4 



Area of distribution: Endemic in Masatierra. 



89. E. sarcophyllum Hook et Arn. — Joiiow, Estud. 101; SKOTTSBERG, 



Stud. 16, Fig. 4, Taf. 5 Fig. 5. 



Masafuera: coast cliffs, very local: Cuming! Joiiow! -- Between Vara- 

 dero and Tierras Blancas (fr. xl U 17, no. 402); Rodado del Sandalo. 



Area of distribution: Endemic in Masafuera. 



Apium L. 



90. A. fernandezianum Joh.; Johow, Estud. 101 ; SKOTTSBERG, Stud. 17, 

 Taf. 5 Fig. 6. 



Masatierra: Tres Puntas (Johoay); barren cliffs in B. del Padre (fr. 15 /i 17, 

 no. 291; beg. fl. 6 / 8 17, BaCKSTROM no. 291b; also observed by Joiiow and 

 by the writer, 1908); Tierras Blancas (fl. 6 /a 17, BACKSTROM no. 12 19). 



Cultivated in a temperate house this species develops exceedingly well 

 and flowers and fruits freely. The branches, which are decumbent and root at 

 the nodes, attain a length of one meter. The fruit is typical of the genus and 

 agrees with that of A. graveolens in structure. A. fernandezianum is related to 

 A. prostration Labill., widely dispersed in the Southern Hemisphere; it differs 

 above all in the shape and cutting of the leaves. 



Area of distribution: Endemic in Masatierra. 



Ericaceae. 

 Pernettya Gaud. 



91. P. rigida (Bert.) DC. — JOHOW, Estud. 87. 



Masatierra: Generally outside the forest but rare below the wooded 

 region; one of the most important shrubs on the rocky ridges, where it forms 

 low thickets. It does not, however, thrive well in the dry western section. We 

 found it on all the ridges to the highest altitude reached (c. 800 m), and I am 

 sure it is a leading species on the top of the Yunque. — Fl. /12 16, no. 27; 



11 —20100. The Nat. Hist, of Juan Fernandez and Easter Isl. Vol. II. 



