256 cxxxiii. ORCHiDE^ (rolfe). [^Platycoryne. 



Eastern species. 



Spur clavate . . . . . . 4. P. huchananiana. 



Spur scarcely dikted at the apex . . . 5. P. tenuicaulis. 



Lip distinctly trilobed , . . . . 6. P. crocea. 



Spur 11-13 lin. long 7. P. Protearum. 



Petals bilobed. 



Posticous petal lobe filiform . . . . . 8. P. Chiingangce. 



Posticous petal lobe ovate-lanceolate . . . 9. P. poggeana. 



1. P. aurea, Rolfe. Plant slender. Stem 12-13 in. long, sparsely 

 leafy. Leaves oblong-lanceolate, acute or acuminate, lJ-2 in. long, 

 4-5 lin. broad, passing into sheaths below and bracts above. Racemes 

 congested, 3-5-flowered. Bracts nearly spathaceous, ovate, acute. 

 Flowers 3-4 lin. long, golden yellow. Dorsal sepal ovate, acute^ 

 cucullate or galeate, recurved at the apex ; laterals deflexed, subfalcate, 

 oblong, acuminate. Petals simple, falcate, adherent to the dorsal 

 sepal. Lip simple, narrowed from a triangular base, acuminate, as long 

 as the lateral sepals ; spur filiform, straight, 1-1 J lin. long. Stigmatic 

 processes thick, fleshy. Anther channels straight, "a little shorter 

 than their caudicles." Rostellum with a cucullate base, lanceolate 

 above, nearly as long as the anther. — Hahenaria aurea, Kranzl. in 

 Engl. Jahrb. xvi. 209 ; Durand & Schinz, Conspect. Fl. Afr. v. 74. 



Upper Guinea. Upper Senegal, in rice fields, Lecard, 204. 



Only known to me from the original description. 



2. P. paludosa, Rolfe. Plant slender, 1-1 J ft. high. Leaves 

 few, cauline, rather distant, oblong-lanceolate, acute, J-1^ in. long. 

 Racemes 2-4- (sometimes 1-) flowered. Bracts ovate-lanceolate, shortly 

 acuminate, 4-5 lin. long. Pedicels 6-9 lin. long. Flowers deep 

 orange. Sepals 4 lin. long ; dorsal ovate-oblong, apiculate ; lateral 

 lanceolate-oblong, subacute. Petals simple, lanceolate, subacute, 4 lin. 

 long, appressed to the dorsal sepal. Lip subspathulate-linear, obtuse, 

 2^ lin. long, with a pair of minute, basal teeth ; spur subclavate, sub- 

 acute, 4 lin. long. Stigmatic processes oblong, obtuse, connate, 1 lin. 

 long. Anther channels linear-oblong, 1| lin. long. Rostellum triangu- 

 lar, subobtuse, 1 lin. long. — Hahenaria paludosa, Lindl. in Journ. Linn. 

 Soc. vi. 139 ; Kranzl. in Engl. Jahrb. xvi. 208. 



Upper Guinea. Niger Territory : Nape ; in swamps. Barter, 1479 ! 



3. P. "WUfordii, Rolfe. Tuber oblong, | in. long, 5 lin. broad. 

 Stem slender, 8-11 in. long, 4-5-leaved. Leaves oblong-lanceolate,, 

 acute or apiculate, sheathing, 1 in. long, 2 J lin. broad. Racemes 1-3- 

 (usually 2-) flowered. Bracts broadly ovate, one-third as long as the 

 ovary. Pedicels 14 lin. long. Flowers yellow. Dorsal sepal broadly 

 oblong, acute, 3| lin. long; laterals reflexed, half twisted, oblong- 

 linear, acute, carinate behind. Petals lanceolate, falcate, acute,^ 

 adherent to the margin of the dorsal sepal, free only at the apex. Lip 

 simple, narrowly linear from a slightly smaller base, obtuse, as long a& 

 the sepals ; spur cylindrical, obtuse, twice as long as the sepals. Stig- 

 matic processes triangular, acute from a broad base, deeply excavate 



