446 ORCHIBES hartwegia. 



The sc.ipe erect , 1' long, rountl and wiry, with many joints, each of which is 

 sunoundefi l)y a pale brown-coloured bract. which closely embraces the stem, and 

 covers it hnlf way between joints. Flowers are terminal , of the same bright pinljish 

 eolour as tbose of the old variety, from which however ihey differ in the form and 

 size of the sepals. which are not obliquely cordate , but ovate oblong. and ralher 

 smaller than in the other. Tbe labelium is also very different being much larger 

 in everv respect and having n notcb at tbe point ; where as in tbe original species 

 il is small, roundisb cordate and forms a kind of spur where it joios the column. 

 In ihis varieiy tbere is no appearance of a spur bul it is narrowed round the co- 

 lumn and has a singular indentation just ojiposite its point. — The column is curved 

 and aboul ibo same lengtb as the sepals and petals. it is also a deeper pink , and is 

 rounded on ibe upper side; beneath it is 2 edged from being slighily hollowed out 

 along tbe middle. Tbe anllier case is somewhat reniforra , brownish pink , much 

 darker than any otber part of tbe flower.'' — Wm. B. Booih. 



1373 mOTHOWAEA LindL 

 Hook. B. J. 1 p. 12. 13. — 1834. : Lindl. on Peruv. Orcbideae. 



Sepila connjventia, dislincla; lateralibus paulo longioribus. Petala 

 sepalo snpremo concavo conformia et subaequalia. Labellum cum 

 cyaflio e Interibus dihitalis membranaceis colurnnae formato articulatum, 

 obsolefe lobatum, basi bilamellatum , sepalis lateralibtis multo longius, 

 dependens. Columna erecta, clinandrio cucullato antheram obsolete 4 

 locularem semitegenfe. Pollinia 4, solida, pyriformia, apice raaterie pul- 

 verea cohaerentia. Herba epiphyta, racemosa , ebulbis. Racemi axil- 

 lares, multiflori, foliorum longitudine. Flores majusculi. 



This distinct genus is remarkable for a wide, compressed cup, formed by the dila- 

 led cunenie margins of the column, witli whicb ihe labellum is articulated. Its prin- 

 cipal affiniiy is with Epidendrum , from which it is farther distinguished by its 4 

 pyriform pollen-masses and hooded clinandrium. The exact nature of the powdery 

 malter, that terminates tbe pollen-masses, I bave not ascertained : it most probably 

 indicales ibe presence of ihe replicate straps tbat characterize Epidcndreae. From 

 O^OVTf] a sail, in allusion lo ihe 2 membranes slretcbed from tho column to tbe lip, 

 like jibs from ihe formast to the bowsprit of a ship. 



1. DIOTHONAEA LLOENSIS I. c. 



Caulis ramosus, compressus, vaginis persistenlibus foliorum squa- 

 matus, pedalis v. ultra. Folia lineari-Ianceolata , slriata, margjne revo- 

 luta, apice paiilulum obliqua et subcartilaginea. Racemi 2poIlices longi, 

 9 tlori. Bracteae subulatae, scariosac. reflexae. Flores membranacei, 

 verosimiliter fiavescentes. Labellum subrotnndum, concavum, obsolete 

 4 lobum. 



Valley of Lloa, western declivity of ihe Andes. Colonel Hall. 



2. DIOTHONAEA GRATI^SIMA Rchb. fll. in v. Mohl u. v. Schlchdl. bot. Zeh. 1852. 772. 

 Foliorum vafjinis laevibiis, nec arpophyllaceis , lamina apice obtuse 



einnr^inata, medio mucroniilata , nec biloba, labello basi vulgo biauri- 

 cuhilo. — 

 2. DIOTHONAEA SUAVIS Rchb. fll. Wswz. Bpl. IL 112. 



aff. D. gralissimae quadruplo major labelli nervis mediis serrulato 

 carinatis, alis gynostenni moie D. Iloensis dependentibus. 



Caulis penna ansorina crassior, ramosus. Vaginae orpophyllaceae, laminae lignlaiae 

 oblusae cum apiculo, racfnius — Sflorus, bracleae ianceosubulatae ovario pedicellato 

 bis— tcr breviores, llores inversi. speciosi, sulphurei (ex sicco); sepalum sumraura 

 triangulura acuiiusculum, sepala lateralia subaequalia, margine inferiori obliqua basia 



