9 
in our gardens, it seems desirable to amend the generic cha- 
racter, and to bring together all that is now known concern- 
ing them. 
ZYGOPETALUM. 
(Hooker. in Bot. Mag. t. 2748. Lindl. Orch. no. 113.) 
Perianthium explanatum, sepalis petalisque ascendentibus, subsequalibus, 
cum ungue producto column connatis. Labellum muticum, planum, 
indivisum, patens, ungue ascendente : cristá magná transversä carnosä. 
Columna brevis, arcuata, marginata, seepius utrinque subdilatata, nunc 
in cucullum expansa. Anthera subbilocularis carnosa, nunc vertice 
rostrato. Pollinia 2, bipartibilia, in glandulam transversam subsessilia. 
Herbs terrestres, subacaules, foliis plicatis patentibus. Flores 
speciosi, suaveolentes, labello coerulescente. 
1. Z. Mackaii (Hooker. Bot. Mag. t. 2748. Lod. Bot. Cab. t. 1664. Eulo- 
phia Mackaiana, Lindl. in Bot. Reg. t. 1433.) ; foliis lorato-lanceolatis 
striatis apice recurvis racemo brevioribus, sepalis petalisque oblongo- 
lanceolatis acutis, labello obcordato glaberrimo, callo crassissimo bilobo. 
Brazil. Known from all the genus by its blue-veined perfectly 
smooth lip, and two-lobed crest. The blotches on the sepals and petals 
are somewhat smaller than in the other species. 
2. Z. intermedium (Lodd. Cat. no. 1136. Z. velutinum, Hoffmannsegg in 
Bot. Zeit. 1. 835.2); foliis ensiformibus racemo brevioribus, sepalis 
petalisque oblongis acutissimis, labello subrotundo undulato basi angus- 
tato alté bilobo pubescente, callo crenulato indiviso. — — Brazil. 
This is generally confounded in collections with Z. Mackaii, from which 
itis readily known by its downy labellum. It is perhaps the finest of 
the genus. 5 
3. Z. brachypetalum ; foliis ensiformi-lanceolatis scapo elato multifloro bre- 
vioribus, sepalis petalisque oblongis obtusis, labello transverso sub- 
rotundo emarginato basi vix angustato pubescente, callo integerrimo. 
Brazil. Flowers most like those of Z. intermedium, but less 
than half the size. The sepals and petals are short, stiff, convex, and 
hardly acute, very much more brown than green, in consequence of the 
blotches running together. The lip is entirely covered with blue veins 
and spots, firm, hardly at all narrowed to the base, and very little 
emarginate. I received it from Mr, Waterhouse, of Halifax, in Decem- 
ber, 1840. 
4. Z. crinitum (Lodd. B. Cab. t. 1687. Bot Mag. t. 3402. Z. pubescens, Hffsgg. 
in Bot. Zeit. 1. 835. ?) ; foliis lato-lanceolatis, bracteis cucullatis, sepalis 
petalisque lineari-lanceolatis acutissimis, labello obovato emarginato basi 
longè angustato venis villosissimis, callo angusto incurvo emarginato. 
—  Brazil.———"There are varieties of this with pink, blue, and almost 
colourless veins to the lip. They all agree in having those veins quite 
shaggy, and a lip which, instead of being broader than long, narrows 
very sensibly towards the base. From the manner in which Count 
Hoffmannsegg describes his Z. pubescens, “ with the tracery of the lip 
