TAB. 38. 



Tribe Ophetde^. 



Sub-tribe Dise^. 



Genus Disa. 



Disa ferruginea, Surirtz, in Kongl. Yetensk. Acad. Nya Hand!. 

 vol. xxi, p. 210 (1800) ; Thunber,/, Flor. Cap. ed 1823, p. 11— 

 (§ Oregura). — Herba glabra elata ; folia 4-8 radic alia linearia acumi- 

 nata graminoidea, scapo saepius breviora, per antbesin eraarcida ; 

 scapus erectus teres subflexnosus rigidus, 25-37 cm. longus, vaginis 

 membrauaceis distantibus setaceo-acuminatis pr^editus, basi fibris 

 foliormn delapsorum cinctus ; spica late ovata pyramidalisve, saepius 

 dense multiflora, 5-9 cm. longa, bractese ovato-acumiuatfe, floribus 

 breviores ; sepala lateralia oblonga acuta, sub apice setaceo-mucronata, 

 porrecta, 1-25 cm. longa ; sepalum impar galeatum ovato-infundibulare 

 acuminatum, cum calcare sensim attenuato filiformi adscendente circa 

 2 cm. longum ; petala nana, sub galea abscondita, falcato-acuminata 

 basi ampliata ; labellum lanceolatum acuminatum, minute undulatum, 

 1-2-1-4 cm. longum; rostellum perbreve latum ; glandulse subdistantes. 

 (Kv exempli, phir. viv.). Satyrium femigineum, Thunberg, Prodr. 

 Plant. Cap. p. 5 (1794) ; D. porrecta, Eer, in Joum. Sci. E. Inst. Land., 

 vol. V, t. 1,/. 1 (1818) non Sicartz: Hooker, Icon. Plant., t. 214 (1840) ; 

 Bolus, Orch. Cape Penins. p. 172 (1888) ; ib., in Joum. Linn. Soc. [Bot.) 

 vol. XXV, p. 175 (1889). 



Hab: South-western Region; Cape Coloxy: Table Mt., near 

 Cape Town, common, from 215 to 1080 me.ter3 alt., fl. Febr.-Apr., 

 many collectors, — MacOwan, 2419, Bolus, 4764, Herb. Xorm. Aust.-Afr., 

 165, — all erroneously distributed as D. porrecta, Sicartz ; also Hotten- 

 tot's-bolland Mts., Burchell, 8199 ; Swellendam, Kennedy, 31. 



Plate 38. Fig. 1, flower, with bract; 2, side sepals; 3, odd sepal; 

 4, petals ; 5, lip, — all tbe foregoing magnified 2 diameters; 6, column, 

 with petals; 7, column, side view; 8, one of the pollinia, — all the 

 latter variously magnified. 



A tall glabrous herb; leaves 4-8 radical linear acuminate 

 grass-like, shorter than the scape, withered at the flowering 

 period ; scape erect terete subflexuous rigid, 25-37 cm. long, with 

 distant membranous acuminate sheaths, clothed at base with the 

 fibres of old leaves ; spike broadly ovate or pyramidal, usually 



