PL. CCCX. 
ANGULOA UNIFLORA ruiz et pavon var. TREYERANI ROLFE 
THE ONE-FLOWERED ANGULOA, M. TREYERAN’S VARIETY. 
ANGULOA. Sepala subaequalia, lata, crassiuscula, fere in globum conniventia, lateralia basi rotundata, sub 
pede columnae connata. Petala sepalo postico subsimilia v. minora. Labellum in pede columnae plus minus stipita- 
tum, carnosulum; lobi latérales ad apicem unguis erecti, paralleli, médius patens, parvus v. latior ciliatusque ; discus 
medio lamella auctus. Columna erecta, semiteres, exalata, basi in pedem brevem producta; clinandrium truncatum 
v. antice biappendiculatum. Anthera terminalis, opercularis, incumbens, galeata, unilocularis ; pollinia 4, cerea, ovata 
v. oblonga, per paria sibimet arcte applicata postico minore, inappendiculata, anthera déhiscente stipiti longo piano 
affixa, glandula ovata. 
Herbae epiphyticae v. terrestres, caulibus brevibus paucifoliatis basi vaginatis mox in pseudobulbos carnosos 
incrassatis. Folia ampla plicato-venosa. Scapi ad latera pseudobulborum erecti, uniflori, vaginis pluribus Iaxis, supe- 
rioribus interdum in laminam foliaceam brevem productis. Flos magnus, erectus. 
Species 3, Andium Columbiae et Peruviae incolae. 
Anguloci Ruiz et Pavon, Fl. Peruv. et Chil. Prodr. (1794), p. 118, t. 26. — Benth. et Hook. f. Gen. 
Plant., III, p. 548. 
Anguloa uniflora. Pseudobulbi conico-ovoidei. Folia late elliptico-oblanceolata, acuta, plicato-venosa. Pedun- 
culus uniflorus, squamis basi imbricatis inflato-tubulosis vaginatus. Bractea spathacea, acuta. Sepala ovata, acuminata, 
cucullato-concava. Petala conformia, minora. Labellum trilobum, lobis lateralibus amplis rotundatis obtusissimis, 
lobo medio lineari-angusto reflexo-revoluto, callo carnoso lato retuso. Columna clavata, apice laciniis duabus subu- 
latis aucta. 
Anguloa uniflora Ruiz et Pavon. Syst. Veg. Fl. Peruv. et Chil. (1798), p. 228. — Lindl. Gen. et 
Sp. Orch., p. 160. — Id. Bot. Reg., XXX, t. 60. — Bot. Mag., t. 4807. — Rchb. f, in Bonplandia, II, p. 277. — 
Rchb. f. in Walp. Ann., VI, p. 599. — Regel Gartenflora , XXXII, p. 353, t. 1137. — Lindenia, III, p. 11, 
t. 100. — III. Hort., XXXVII, p. 37, t. 101. 
A. virginalis Hort. Gard. Chron., 1851, p. 392. 
A. eburnea Williams Orchid Album, III, t. 133. 
he genus Anguloa was established by the Spanish botanists Ruiz and 
Pavon, in 1794, in honour of D. Francisco de Angulo, Director-general 
of Peruvian Mines, a gentleman greatly attached to botanical pursuits, 
upon the species here figured, which they remark is found in clearings (called 
« Carpales ») about Muna and Chincao, and profusely in the woods of Tarma and 
extending to Huayabal, Chanchamayo and Siusa; that it flowers in August and 
September, and that it is called « Flor del Espiritu Santo ». Nothing further seems 
to hâve been known about it until April 1844, when it flowered in the collection 
of Mr Barker of Birmingham, from specimens believed to hâve been received from 
M. Linden’s Columbian collections. There is no wild specimen in D r Lindley’s 
Herbarium from this source, for the one cited by him in the Ovchidaceae Lindenianae 
is certainly A. Clowesii , Lindl. The two are readily distinguishable in the dried 
State, and there is the evidence written on the ticket by M. Linden himself 
— « Pétales d’un jaune sale, labelle blanchâtre » — which just describes 
