MACLOSKIE I HALORAGIDACE^E. 617 



4. MYRIOPHYLLUM TERNATUM Gaudich. (Var. of M. elatinoides?} 

 Monoecious. Leaves ternate, the lower deeply pinnatifid, with capillary 



lacinice, the upper undivided, oblong, entire. Upper flowers male ; lower 



pistillate. 



(Chili); S. Patagon.; RioChico; Fuegia; Falklands. 



5. M. VERTICILLATUM Linn. 



Monoecious. Submersed leaves in whorls of 3 and 4 ; dissected into 

 very fine capillary divisions. Floral leaves pectinately divided, much ex- 

 ceeding the flowers. Petals of the male flowers purplish. 



(Eurasia and N. Amer.); Fuegia. 



2. GUNNERA Linn. 



Scapigerous perennials, with creeping rhizome and mostly radical, alter- 

 nate, petiolate, broad leaves, and spiked to panicled, hermaphrodite or 

 unisexual flowers. Calyx-tube ovoid or compressed, its lobes 2-3, or 

 often in the male flowers none. Petals none or 2, cucullate. Stamens 

 1-2. Ovary i -celled, with i pendulous ovule. Fruit a coriaceous or 

 fleshy drupe. Embryo minute, remote from the hilum, and inverted. 



Species 17, characteristic of the regions from Chili to Tasmania and 

 New Zeal.; also in Fernandez, New Granada, Brazil, Hawaii, S. Africa 

 and Java. (Not reported from Australia.) 



i. G. CHILENSIS Lam. 



Leaves orbicular-reniform, 5-i3-lobed, lobes ovate-acute, irregularly 

 toothed, petioles scabrous, hairy above, pilose on the nerves underneath. 

 Stip^lles numerous in the leaf-axils. Scape usually shorter than the 

 leaves. Spikelets approximate. Calyx 2-toothed. 



Perennial in humid places from Caraccas (Lat. i o N. ) by the Andes to Chili 

 and Magellan. Sometimes to 2 meters high, and cultivated; "amongst 

 the largest of Dicotyledonous vegetables." (J. D. Hooker.) Often with 

 colonies of Nostoc within its stem. "The Panke somewhat resembles 

 rhubarb on a gigantic scale. The inhabitants cut the stalks, which are 

 subacid, tan leather from the roots, and procure a black dye from it." 

 (C. Darwin.) 



N. Patagon., mountain streams near Lago Nahuel-huapi. (Fig. in Eng. 

 & Prantl, iii, 7, p. 235, f. 106; p. 228); W. Patagon. in valley of Rio 

 Aysen; to Ultima Esperanza. (Dusen.) 



