MACLOSKIE : REVISION OF FLORA PATAGONICA. 23 



ovate-oblong; valves alternate, all with dark, subapical, tuberculiform 

 spines. 



N. Patagonia, the Neuquen Territory, by Lago Nahuel-huapi, along the 

 upper part of the Rio Limay ; by Rio Carren-leofu ; Central Patagonia, 

 in the pre-andine region of the Chubut Territory. D. 



Libocedrus tetragona Endl. Macl., p. 12, occurs also in Chili. 



Podocarpus nubigenns Lindl. Macl., p. 143, is found in W. Patagonia 

 by Trinidad Channel, its southernmost limit so far as presently known. 



Dacrydium Fonckii (Phil.) Benth. Macl., p. 144, is known from S. 

 Chili, viz., in the table-land of the Valdivian coast Cordillera, from the 

 Guaitecas Islands and W. Patagonia, the district of evergreen forest (the 

 southern limit of the distribution of the plant is 52 30', according to 

 Skottsberg). 



Family 3. TAXACE.E. 



Add Macl., p. 143: 



PODOCARPUS ANDINA Poepp. 



Arbor parvus aut mediocris, 3-6 m. altus; ramuli foliis distichis, 

 anguste linearibus, apice basique obtuse acutis, in facie inferiore glaucis, 

 c. 25 mm. longis et 3 mm. latis, coriaceis, marginibus minutissime revo- 

 lutis; spicas alternae, paucae, in axillis foliorum supremorum dispositae, 

 demum deflexae, foliis vix superantes ; drupa in apice disci sessilis, glo- 

 bosa, viridis, unilocularis, monosperma ; semen globosum. 



N. Patagonia, Lago Nahuel-huapi ; W. Patagonia, Rio Aysen. (Accord- 

 ing to Spegazzini.) 



Family 4. GNETACE.E. Macl., p. 144. 



EPHEDRA L. 

 Add Macl., p. 144: 



EPHEDRA, KEY TO THE SPECIES. 

 Ai, Internodes long, about 5 cm.; female catkins with 5 pairs of imbricating scales; sheath seg, 



ments 3, acuminate; 4 sessile staminal segments at each node. ochreata. 



A2. Internodes about 3 cm.; female catkins 2-flowered. Leaves and branches mostly oppo- 

 site. 



b. Subscandent. Sheath-segments short, acuminate with a long seta. Anthers 3(-S) 



scarcely exsert. tweediana. 



bz. Branches slender, erect. Sheath-segments long, acuminate-subulate. Anthers 5-7 on 



a column. americana. 



A$. Plants dwarf, 10 cm. high ; internodes about i cm. long. Female catkins 4-flowered, each 



sheathed at base. Sheathed-segments short, ovate. 



