I 1 6 PATAGONIAN EXPEDITIONS : BOTANY. 



Central Patagonia, Chubut Territory near Laguna Blanca. 



Perennial ; rhizome with numerous, caespitose branchlets, clothed by 

 old leaves more or less fragmentary and bearing a rosette of suberect or 

 subrecurved, lanceolate and obtuse leaves 10 mm. long and 2 mm. broad, 

 at first pubescent and marginally ciliolate, soon turning glabrous, non- 

 petiolate, with robust middle nerve, elevated on the under side of the 

 leaves, sheaths submembranaceous, marginally ciliate, united at base; 

 scape about 6 cm. high and i mm. thick, striate, pubescent below, glandu- 

 lar-pubescent at top, binodose, with a pair of small, glandular-pubescent, 

 basally united leaves at every node ; flowers solitary ; calyx campanulately 

 inflated, glandular-pubescent, with 15 dark green, longitudinal lines uniting 

 by threes near the apex of the semielliptical, submucronate lobes; petals 

 somewhat exserted (pink?) with diminutive auricles and appendices usually 

 emarginate, the blades being rotundate and deeply emarginate. Styles 

 5 ; capsule sessile. 



Stands next to Melandryum chubutense Speg., which differs from the 

 present species in smaller flowers, longer and narrower acute leaves (con- 

 tinuous marginally), ciliated all along the margin, and in taller scapes. 



Add Macl., p. 384: 



MELANDRYUM FILIFOLIUM Dus. 



Dus. Neue und Seltene Gefasspfl., p. 20, Taf. i, Fig. 4 und Taf. 7, Fig. 



23-25- 



Perenne; rhizoma subterraneum crassiusculum, superne c. 4.0 mm. 

 diam., breviter pauci-ramosum, ramis tenuibus, vaginis foliorum emortu- 

 orum vestitis, apice foliis dense pennicillatim confertis prasditis; folia 

 angustissima, filiformia, c. 4.5 cm. longa et 0.5 mm. lata, haud rare leviter 

 recurvata, glabra vel primo marginibus ciliatis, ciliis mox evanescentibus, 

 sicca marginibus valde recurvatis, nervum medium attingentibus, epetio- 

 lata, apice callosa, acutissima, in vaginas membranaceas, breves, raptim 

 dilatatas, marginibus ciliatas transeuntia, nervo medio valido, in facie folii 

 inferiore valde prominente ; scapi elongati, ad 22 cm. usque alti, graciles, 

 inferne, c. 0.8 mm. crassi, substriati, glaberrimi, trinodosi, internodiis 

 5.0-9.0 cm. longis, ad nodos foliolati, foliolis linearibus, basin versus dila- 

 tatis, connatis, marginibus inferne ciliatis ; pedicelli graciles, 3.0-6.0 cm. 

 alti, superne glanduloso-puberuli, uniflori, solitarii vel bini trinive, e nodo 



