192 cxxxiii. ORCHiDE^ (rolfe). [HolothHx , 



se'i-ments ; spur narrowly subconical, subobtuse, membranous, IJ-lJ 

 lin. long. Column very short and stout. — Peristylus arachnoideus, A. 

 Rich, in Ann. Sci. Nat. ser. 2, xiv. 267; A. Rich. Tent. Fl. Abyss, ii. 

 281) ; Reichb. f . in Walp. Ann. iii. 58 o. Holothrix arachnoidea, Durand 

 & Schinz, Conspect. Fl. Afr. v. G9, in part. PlaUonthera arachnoidectj 

 Engl. Hochgeb. Fl. Trop. Afr. 171). 

 10*116 Xiand. Abyssinia, Schimper, 504 ! 



J:. H. vatkeana, Reichb. f. in Jomm. Bot. 1870, 84G. Plant over 

 1 ft: high, slender. Leaves, peduncle, bracts, and ovaiy pilose; flowers 

 "labrous. Tubers ovoid-oblong. Leaves 2, radical, spreading, ovate or 

 ovate-oblong, subobtuse or apiculate, 1-1 J in. long, 8 lin. broad. Scapes 

 over 1 ft. long, sparsely pilose. Racemes 3 in. long, lax, many-flowered ; 

 flowers subsecund. Bracts triangular-lanceolate, acute, \\ lin. long. 

 Pedicels 1-J lin. long. Sepals triangular, acute, J lin. long. Petals 

 lanceolate," 2 Irn. long; apex caudate-acuminate. Lip IJ lin. long, 

 trifid to the middle; lobes linear, subacute; spur conical-oblong, 

 incurved at the apex, scarcely J lin. long. — Reichb. f. Otia Bot. Hamb. 

 ii. 72. Schweinf. in Bull. Herb. Boiss. ii. App. ii. 87, 112. 



irile Xiand. Eritrea : Ambelaco, near Maldi, 6500 ft., Schweinf urth, 159; Plateau, 

 of Kohaito, 8400 ft., Schweinf urth, 160 ; Asmara, 8100 ft., Schioeinfurth, 548 ; Geleb, 

 on the River Sabber, 6500 ft., Schweinf urth, 1536; Peak of Alamkale Mountain, 

 5900 ft., Schioeinfurth, 1629. Somaliiaud; Serrut Mountains at Meid, on limestone, 

 1800, Hildehrandt, 1465 ! 



Also found in Arabia. 



5. H. Usambarae, Krdnzl. in Engl. Jahrh. xix. 248. Leaves 2, 

 subopposite, or rarely 3, oblong or oblong-lanceolate, acute or acuminate. 

 Scapes about 13 in. long, naked below, sparsely pilose above with glandu- 

 liferous hairs, and two or three minute sheaths ; spikes secund, 6-20- 

 flowered. Bracts lanceolate, acuminate, one-third as long as the ovary. 

 Dorsal sepal broadly ovate, cucullate, acute ; lateral semioblong, with 

 arching nerves, acute. Petals much smaller than the sepals, oblong, 

 acute, one-nerved. Lip simple, cuneate ; apex retuse, tridentate or 

 obscurely trilobed; spur filiform, deflexed or incurved, |-f as long as 

 the ovary. Column short and stout. 



Mozauxb. Sist. German East Africa : Usambara ; high region, in gravel, Rolsf, 

 391. 



Only known to me from the original description, but said to have the habit 

 of H. orthoceras, Reichb. f. 



G. H. arachnoidea, Reichb. f. Otia Bot. Hamb. ii. 107 {excl. syn.). 

 Leaves 2, equal, ovate, transverse, subacute or the upper one acute, 

 areolate when dried, as in Satyrium ; base subcordate. Peduncle 

 elongate, hispid with deflexed hairs; spikes 6-10-flowered. Bracts 

 lanceolate, acuminate, pilose, as long as the ovary. Flowers yellow. 

 Sepals lanceolate, aristate. Petals scarcely longer than the sepals, 

 oblong, abruptly cuspidate with much exserted apex. Lip cuneate- 

 flabellate, 5-lobed in front ; lobes ligulate, acute ; disc papillose ; spur 



