ZYGOPETALUM 



zomes, like Z. maxillare, thrive best on sections of tree 

 tern, osmunda rhizome or in baskets. A good compost 

 consists of equal parts of chopped sod, peat fiber and 

 sphagnum moss, well mixed and interspersed with 

 pieces of rough charcoal, about one -half of the pot 

 space being devoted to clean drainage material. After 

 distributing the routs, the compost should be worked in 

 carefully but not too firmly about them, leaving The 

 base of the plant even with, or just above, the rim of 

 the pot. Repotting should be done when the plants 

 show new root action. The temperature should range 

 about 60° F. by night and 05° to 70° by day in winter, 

 and in summer as low as possible, with free ventilation 

 during inclement weather. A cool, light location in the 

 cattleya department is favorable. The compost should 

 be kept in a moist condition at all times. The plants 

 are propagated by cutting through the rhizome between 

 the old pseudobnlbs at a good eye, potting up the parts 

 and removing them to a rather higher temperature un- 

 til they start into new growth. 



The Batemanuia, Pescatoria and Warczewiczella 

 groups are very similar in habit of growth, and all 

 thrive well in orchid baskets suspended from the roof 

 of the odontoglossum or coolhouse, in a compost con- 

 sisting almost entirely of chopped live sphagnum, 

 freely interspersed with rough pieces of charcoal. Au- 

 tumn is the best time to rebasket the plants, as they 

 suffer during the warm weather if disturbed at the 

 roots during spring. They need a shaded location, a 

 moist atmosphere and a liberal supply of water at the 

 roots at all seasons. Never allow them to remain dry, 

 as they have no resting season. 



The Bollea group is closely allied and requires the 

 same general culture but needs 5° F. higher tempera- 

 ture during the winter season. 



The Promem-ea group comprises a few small-growing 

 species, all good subjects for the cool department. 

 They grow best suspended from the roof in small bas- 

 kets or perforated pans in a mixture of peat fiber and 

 chopped sphagnum with a liberal supply of water and 

 >-' 1 drainage. r jl. Grey. 



ZVGOPETALUM 



2015 



a. Scape tall, several-fid. 



B. Anther long -rostrate 1. rostratum 



BB. Anther not rostrate 



c. Petals spotted or blotched. 

 v. Labellnm glabrous 2. Mackaii 



3. Gautieri 



4. maxillare 

 dd. Labellnm pubescent 5. crinitum 



6. intermedium 



cc. Petals uniformly colored 7. Sedeni 



AA. Scape shorter than the Irs., 1-fld. 

 B. Column hood-like, arching over 

 the crest. 



c. Fls. deep violet 8. violaceum 



cc. Fls. violet-purple 9. cceleste 



ccc. Fls. rose-colored 10. Fatini 



11. Lalindei 

 bb. Column not hood-like. 



c. Fls. brown, spotted 12. Burtii 



cc. Fls. white of greenish white. ..13. discolor 



14. Wendlandi 



1. rostratum, Hook. Pseudobnlbs oblong, compressed: 

 Ivs. lanceolate, 5 in. long: scapes 4 in. long, bearing 

 1-3 fls.: sepals and petals linear-lanceolate, greenish 

 brown, wavy, 2-3 in. long; labellum about as long as 

 the petals, subrotund, with reflexed margins, pure white 

 with few radiating lines near the base: column wings 

 rounded, sharply serrate on the upper margin: anther 

 with a long beak surmounting the column. Mav, June, 

 Oct. Guiana. B.M. 2819. J.H. III. 28:7. A.F. 0:633. 



2. Mackaii, Hook. Fig. 2799. Paeudobulbs large, 

 ovate: Ivs. many, linear-lanceolate, 1 ft. long: scape 

 18 in. long, bearing 5 or 6 large Ms.: sepals and petals 



127 



dingy yellowish green, with blotches of purple on the 

 inside, lanceolate, acute, erect, spreading, all united 

 toward the base; labellum large, rounded, emarginate, 

 white with radiating vein like deep blue lines, glabrous 

 Brazil. B.M. 2748. B.R. 17:143:: las Eulophia Mack 

 aiana). P.M. 3:97. L B.C. 17:1004. J.H. III. 33:295 

 — This is distinguished from Z. intermedium and Z 

 crinitum by its smooth labellum and narrower 1 

 Vars. superbum, grandifldrum, majus are also adver 

 tised. 



3. Gautieri, Lem. Pseudobnlbs oblong sulcate, 4 in. 

 high: scape 2-3-fld. : fls. 3 in. across; sepals and petals 

 green blotched with brown; labellum broadly reniform, 

 deep purple at the base, white in front, sometimes 

 nearly all deep purple with a darker crest. Autumn. 

 Brazil. l.H. 14:535. Gn. 49:1053. -The Ivs. are fascicu- 

 late, narrowly oblong, keeled, 12-10 in. long: inflores- 

 cence shorter than the Ivs. 



4. maxillare, Lodd. Pseudobulbs 2 in. long: Ivs. 

 lanceolate, 1 ft. long: scape 9 in. long, 0-8 fid.: tls. i% 

 in across; st-pals and p,-t:i|s ovatf-ol.long, acute, green, 

 with transverse brown blotches; labellum horizontal, 

 purple, with a very large, glossy-purple, notched horse- 

 shoe-shaped crest, middle 

 lobe roundish, waved, and 

 obscurely lobed. Winter. 

 Brazil. B.M. 3086. L.B.C. 

 18:1770. J.H. III. 33:295. 

 P.M. 4:271.- Distinguished 

 by its small fls. and very 

 large crest 



2739. Zygopetalum 



Mackaii (X}£). 



5. crinitum, Lodd. Habit of Z. intermedium; Ivs. 

 broadly linear-lanceolate: fls. on long, stout scapes; 

 sepals and petals 2 in. long, oblong-lanceolate, green 

 with rather few brown blotches; labellum 2 in. across, 

 spreading, wavy, scarcely emarginate, white with purple 

 veins radiating from the thick crest, disc hairy. Fls. 

 at various times. Brazil. L.B.C. 17:1637. B.M. 3402 

 (as Z. Mackaii, var. crinitum I. — This has fewer brown 

 blotches on the sepals and petals than Z. intermedium. 

 There are varieties with pink, blue, or almost colorless 

 veins on the labellum. Var. caeruleum, Hon., has the 

 vines deep vivid blue. 



