1550 CXXVII. OBCHIDE^. 



18. LUISIA, Gaudich. 

 (After Don Luis de Torres.) 



Sepals subequal or the decurved dorsal smaller. Petals often longer, narrower. 

 Labellum sessile on the base of the column, base flat concave or saccate. 

 Column very short, truncate. Anther 2-celled ; pollen-masses 2, subglobose, 

 seated on a replicate short strap. Capsule narrow, erect. Tufted epiphytes. 

 Stems terete, rigid, sheathed, pseudo-bulbs none. Leaves elongate, terete, obtuse. 

 Flowers drooping, small, spicate on a short or very short stout erect axillary 

 rhachis. Bracts very short, thick, imbricating, persistent. 



Spacies few mostly belonging to tropical Asia. 



1. !•. teretifolia (leaves terete), Gaudich. Bjt. Freye. Yoy. 427, t. 37 ; Hook. 

 Fl. Brit. Iiid. vi. 22. Stems from 6 to over 12in. long, often stout. Leaves 

 4 to Sin. long, cylindrical. Peduncles very short ; flowers small, few, crowded ; 

 lower bracts truncate, upper deltoid ; lateral sepals subacute. Keel winged. 

 Petals linear- oblong, obtuse, hardly longer than the sepals, about 2 or 3 lines 

 long. Labellum but slightly incised, the lower part nearly quadrangular. 

 Column very short. Capsule 9 to 18 lines long. — Blume Rumph. iii. t. 194, f. 3, 

 t. 1970. 



Hab.: Goode Island. 



19. SARCOCHILUS, Br. 



(Lip fleshy.) 

 Thrixspermum, Laur ; Gunnia, Lindl. 

 Sepals and petals nearly equal, free, spreading, the lateral sepals often more or 

 less dilated at the base and adnate to the basal projection of the column. 

 Labellum articulate at the end of the basal projection of the column without any 

 spur at its base, 3-lobed, the lateral lobes rather large, the terminal one (in the 

 Australian species) very short or tooth-like or cushion-like, with a solid fleshy 

 dorsal protuberance at its base sometimes elongated oblong or conical, sometimes 

 very short ; the disk between the lateral lobes with prominent callosities. 

 Column short, erect, produced at the base. Anther terminal, lid-like. Pollen- 

 masses 4 in pairs on a somewhat flattened caudicle. — Epiphytical herbs. Stems 

 short, either covered with the prominent persistent truncate bases of the leaves or 

 leafless. Leaves flat and often falcate, or narrow-linear, or none. Racemes 

 axillary. Bracts small. Capsules usually linear or narrow-oblong.' 



The genus is spread over East India and the Arehipelagp, but the Australian ones appear to 

 be all endemic. 



On rocks forming thick masses. 



Stems stout, 3 to 4in. long. Leaves fleshy, 5 to 6in. long, J to Jin. 

 .« broad, the apex unequal sided. Peduncles and rhachis stout; flowers 



numerous white with red centre; middle-lobe of labellum minute . . 1. 5. Hartmannii. 



Epiphyle. Stem nearly 2ft. long ; roots strong, long and wiry. Leaves 



3 to Sin. long, 1 to nearly 2in. broad. Peduncle with raceme 1ft. long 



flat, flowers on the margins, pedicels slender. Sepals 6 lines long ending 



in filiform points. Labellum middle-lobe subulate. Capsule about Sin. 



long, beaked . . . • -.-... 2. S. plaiystaehys. 



Leaves oblong, lanceolate or falcate. Middle lobe of the labellum short and' 

 toothlike, glabrous. 

 Lateral sepals adnate to the base only of the projection of the column 

 which represents a olaw to the labellum. 

 Sepals and petals narrow-linear, subulate-acuminate, 1 to over IJin. 



long. Roots very rough 8. S. diviiiflonis. 



Sepals and petals oblong, 6 to 7 lines long i. S. falcatiis. 



Lateral sepals adnate to the whole of the projecfion of the column. 

 Sepals (5 to 6 lines) twice as long as the labellum. 



Sepals and petals oval-oblong 5. S. Fitzgeraldi, 



Sepals and petals linear-oblong . . 6. S. olivaceous. 



Sepals (about 5 lines) but little longer than the labellum 7. S. parviflorus. 



