Contributions to the African Flora. 147 



Mystacidium millaei, Bolus, n. sp. (Orchidaceae-Vandeae). 



M. (§ Gomphocentrum) sepalo impari oblongo obtusissime rotundato, 

 concavo, basi dente in utroque margins aucto ; petalis ovatis ; labelli 

 lamina ovata, obtusa, calcare basi inflato deinde cylindrico, sensim 

 attenuato, quam lamina 3^-plo longiore, 



Epiphyta caulescens glabra ; radices aerales 0-23 cm. crassae ; 

 caulis validus, 0-4-0-5 cm. crassus, vaginis foliorum delapsorum 

 vestitus ; folia 2-3, pleraque apice caulis conferta, erecto-patentia, 

 ligulata subundulata, inaequaliter biloba, lobis angustatis subobtusis, 

 medio nervo depresso percursa, coriacea, 8*5 cm. longa, 1-4-1-6 cm. 

 lata ; racemi squarrosi subrecti rigidi, 7-10-flori, 2-4 cm. longi ; flores 

 plerique erecti, albi ; pedicelli cum ovario 0-8-0-9 cm. longi ; sepala 

 lateralia patentia, oblongo-oblanceolata, subacuta, 0*6 cm. longa, 

 parte latiore 0-22 cm. lata ; sepalum impar erectum, oblongum, 

 obtusissimum, subconcavum, basi dente in utroque margine auctum, 

 0-6 cm. longum, 0*45 cm. latum ; petala erecto-palentia, oblique 

 ovata subacuta, sepalis paullo breviora, 0*32 cm. lata; labelli lamina 

 ovata, obtusa, concava, apice decurva, petalis aequilonga, calcare 

 basi inflata, deinde cylindrico incurvo, 2 cm. longo ; columna de- 

 curva, oblonga vel subrhomboidea, infra medium dilatata ; pollinia 

 lenticularia, in stipitibus filiformibus, glandulis ovatis ; rostellum 

 exappendiculatum . 



Hab. : Natal, near Durban, on trees, alt. 500 ft., fl. Jan., Coll. 

 A. D. Millar (Natal Gov. Herb., No. 8437). 



Described from fresh specimens ; flowers white. In the general 

 appearance of the flowers this resembles M. gracile Harv. ; but the 

 shape of the perianth segments and the nude rostellum, show it to 

 be quite distinct. I can find nothing like it amongst the tropical 

 Mystacidia in the Flora of Tropical Africa. 



Holothrix Culveri, Bolus, n. sp. (Orchidaceae-Ophrydeae). 



H. (§ Tryphia) spica dense multiflora ; sepalis lanceolatis a cutis , in 

 var. j3 lateralibus basi calcaratis ; petalis oblongis acutis, quam 

 sepala dimidio longioribus, duplo latioribus ; labello subquadrato, 

 3-lobulato, vel, in var. /3, lobulis lateralibus carentibus. 



Folia radicalia 2 (?), unicum tantum visum emarcidum ovatum ; 

 scapus erectus gracilis, vaginulis remotis erectis lanceolatis acumi- 

 natis aristulatis membranaceis vestitus, basin versus retrorse pilosus 

 sursum glabrescens, ad 12 cm. altus ; spica cylindrica, dense multi- 

 flora (30-60-fl.), 4-5 cm. longa, 0*8 cm. diam., floribus quaquaversis 

 (vel interdum, ex collectore, secundis) ; bracteae lanceolatae acumi- 

 natse, inferiores ovario paullo longiores, superiores breviores ; sepala 



