Contributions to the African Flora. 145 



Tropical Africa, vol. 7, 133, 169), as distinguishing Mystacidium 

 from Angraecum, are, that the former has flowers with the two pollinia 

 on two distinct stipes, each with a separate gland ; while the latter 

 has two pollinia on a single stipe and gland. These characters have 

 the merit of clearness ; and I have no sufficient reason to doubt their 

 constancy, though I am under the impression that I have seen 

 flowers of M. filicorne with a single, or two very closely approximate, 

 glands. I propose now to follow these authorities, and the more 

 willingly since this arrangement will probably be adopted in the 

 continuation of the Flora Gapensis. The result is simply to enlarge 

 the limits of Lindley's Mystacidium ; while the peculiar character 

 which he had in view might with advantage be used as forming the 

 section Eumystacidium. The South African species at present 

 known would then be arranged thus : — 



1. Mystacidium filicorne, Lindley, in Comp. to Bot. Mag., 2,206; 

 Thesaur. Cap. 2, t. 175 ; Bolus, Icon. Orch. Aust.-Afr., t. 55. 

 (Epidendrum capense, Berg, Descr. PI. Cap. (1767), 347 ; Linn, f., 

 Suppl. (1781), 407. Limodorum longicome, Thunb., Prodr. (1794), 3 ; 

 Swartz, in Schrader's Journ., Bot. (1799), 230. Eulophia longicornis, 

 Spreng., Syst. Veg. (1826), 3,720. Angr cecum capense, Lindl., Gen. 

 Sp. Orch. (1833), 248. Aeranthus filicornis, Reichb. fil., in Walp. 

 Ann. (1861), 6,900.) 



2. M. gracile, Harvey, Thes. Cap. (1863), 2, t. 174 ; Bolus, Icon. 

 Orch. Aust.-Afr., t. 56. 



3. M. pusillum, Harvey, Thes. Cap. (1863), 2, t. 173; Bolus, I.e., 

 t. 57. 



4. M. Gerrardii, Bolus, in Journ. Linn. Soc, vol. 25 (1889), 187. 

 Aeranthus Gerrardii, Reichb. f., in " Flora' (1867), p. 117. Angrcecum 

 Gerrardii, Bolus, Icon. Orch. Aust.-Afr., v. 1 (1893), t. 7. 



5. M. Peglerae, Bolus (see below). 



6. M. Caffrum, Bolus (Angrcecum caffrum, Bolus, Icon. Orch. 

 Aust.-Afr., t. 8). 



7. M. Millari, Bolus (see below). 



8. M. Planaganii, Bolus {Angr cecum Flanaganii, Bolus, Icon. Orch. 

 Aust.-Afr., t. 52). 



Kostellum with two bearded appendages (§ Eumystacidium Pfitzer, amended) 

 Sepals and petals nearly equal and all acute or acuminate. 



Spur of the lip 35-5 - 2 cm. long ; leaves 3-9 cm. long . . filicorne, Lindl. 



,, ,, ,, 3-3*5 cm. long ; leaves 2-3 - 8 cm. long . . gracile, Harv. 



Petals obtuse, shorter than the sepals pusillum, Harv. 



Kostellum naked (§ Gomphocentrum, Pfitzer). 

 Lip about as broad near the apex as its length. 



Lip trowel-shaped, spur falcately incurved Gerrardii, Bolus. 



Lip fan-shaped, spur slightly incurved Peglerce, Bolus. 



