132 MR. J. MIKRS ON SOME 



striolate, glabrous, bearing numerous aggregated sessile flowers ; 

 calycle ovate-lanceolate, cuspidate, villous outside, 3|-5 lines 

 long, 1 line broad ; sepals 2, erect, If line long, | line broad, 

 arachneo-tomentose : corolla of a yellowish red colour, sparsely 

 invested with very long flexuose white hairs ; tube slightly 

 cylindrical, subincurved, G^ lines long ; segments subacute, 

 2| lines long, f line broad, subreflexed, glabrous within, except 

 where they are each furnished at its base with a linear feather- 

 like process densely pinnate, with shortish septiferous hairs ; 

 filaments slender, glabrous, reaching the mouth : anthers linear, 

 1 line long, verticillately attached dorsally in their middle, erect, 

 half exserted ; ovary oblong, | line in diameter, surmounted by 

 the usual disk and a very slender style reaching the stamens ; 

 stigmata 3, linear, lamellar, shortly hirsute. 



6. Arjona rigida., nob. — Arjona tuberosa, Philippi (non Cav.)* 

 Linn, xxxiii. p. 231. 



Humilis, suffruticosa, caulibus gracilibus, striatis, glabris; foliis iuferi- 

 oribus minoribus, sparsis, superioribus majoribus, magis approximatis, 

 Lineari-lanceolatisj canaliculars, imo arnplexieaulihus, apice pungenti- 

 cuspidatis, ngidis, conspicue 5-nerviis, marginibus cartilagineis, paten- 

 tim divaricatis, subrecurvulis, glabris, supra pallide viridibus, subtus 

 flavide opacis, nervis prominentibus ; inflorescentia terminali, laxe 

 capitata; pedunculo brevi, sericeo-piloso ; floribus sessilibus, subap- 

 proximatis; calyculo ovato-lanceolato, navioulari, acuminata, villoso; 

 sepalis distincte 2, lateraliter oppositis, calyculo absconditis, acute 

 oblongis, niveo-tomentosis ; corolla aurantiaca, extus cano-villosa 

 pilis retrorsis ; tubo exigue cylindrico, striolato, fauce paullo am- 

 pliore; segmentis acute oblongis, subrevolutis, intus glabris, nisi ad 

 lituris niveo-hnearibus (ut in A. ruscifolio) ; staminibus fauce sub- 

 inclusis ; filamentis brevibus, tenuissimis ; antheris linearibus, medio 

 dorsi affixis ; ovariobreviter obconico, pentangulari, disco piano coro- 

 nato; stylo filiformi, stamina attingente ; stigraatibus 3, lamellatis, 

 erecto-divergentibus. E regione Argentine, travesia del Desaguadero, 

 inter provinc. Mendoza et San Luiz : v. v. et sice, in herb, meo (410), 

 cum icone ex vivo colorato; in travesia Mendozse (1064). 



Stems 3 in. high ; lower leaves 2 in. long ; upper ones 1| line 

 apart, 6-8 lines long, 1| line broad; peduncles 4 lines long; 

 laxly congested head of flowers 1 in. long, | in. broad ; calycle 4 

 lines long, 1| line broad ; sepals 2 lines long, 1 line broad ; tube 

 of corolla 6 lines long ; segments 2 lines long, ^ line broad, each 



with a basal foment ous process 1 line long; linear anthers 1| line 

 long. 



