20 PATAGONIAN EXPEDITIONS I BOTANY. 



N. Patagonia, common by Rio Carren-leofu ; W. Patagonia, Rio Aysen 

 abundant in sandy places, N. W. Patagonia, Rio Manso. 



Description. Stems usually fasciculate, scaberulous, transversely rugose, 

 deeply 4-9-sulcate, solid, 6-10 cm. tall (of Patagonian specimens), 

 quadrangular or at the most octagonal or enneagonal, more or less regu- 

 larly branched or unbranched; sheaths lax, tumid, 6-10 mm. long, green, 

 with ferruginous membranaceous teeth ; branches sparse or none, usually 

 single to three, very seldom quaternate to quinary, short or long, sometimes 

 bearing branchlets, quadrangular to pentagonal ; spike fuscous, 8-15 mm. 

 long, oblong, obtuse, sometimes, shortly apiculate ; stomata numerous, 

 phaneroporus, in a single, broad row at the bottom of the furrows. D. 



Add Macl., p. 136: 



EQUISETUM FLUVIATILE L. var. LIMOSUM (L.). 



Stems all similar; sheaths appressed with about 18 short brown 

 teeth. Branches usually 10-30, furrowed. Central cavity very large, 

 branches and roots also hollow. 



Eurasia, Europe, and N. America ; N. Patagonia, at the confluence of 

 the Rio Limay and Rio Neuquen. Fide Spegazzini. 



E. FLUVIATILE L. var. LIMOSUM (L.) forma ULIGINOSUM (Miihlenb.). 

 N. Patagonia, by Rio Carren-leofu. (According to Spegazzini.) 



E. RAMOSISSIMUM Desf. Macl., p. 136. 



N. Patagonia, near Carmen de Patagones; Central Patagonia, by Rio 

 Chubut, according to Spegazzini. 



Add to Macl., p. 137: 



Family 7. LYCOPODIACE.E. Club-moss. 

 LYCOPODIUM CHONOTICUM Phil. 



Creeping, leaves 4-ranked, acute, thick ; spikes ending the short 

 branches, paired, erect ; bracts appressed, scutellate ; sporangia reniform, 

 inserted on the pedicel of the bracts. 



L. clavatum L. var. fastigiatum Hook. (Macl., p. 137) is probably 

 identical with L. magellanicum. There is in our district a form or variety 

 of L. magellanicum worthy of mention. It is distinguished by more dis- 

 tant, not fastigiate, branchlets and less densely attached leaves. This 

 form is noticed near Lago Buenos Aires and in the Chonos Archipelago. 



