MACROSCOPIC AND MICROSCOPIC CHARACTERS OF PLANTS. 



819 



In boih hybrids the length is between those of the parents, 

 though in C. lathamianum it is nearer C. spicerianum, 

 while in C. lathamianum inversum it is nearer C. vil- 

 losum; the width, however, is identical in both plants 

 with that of C. spicerianum. (Table J 53.) 



In C 1 . spicerianum the anterior sepal is broadly ovate 

 with recurved margins, and pale green with no markings ; 

 in C. villosum, yellowish green with two narrow lines of 

 brownish purple extending along the 2 median veins ; 

 in C. lathamianum, a little darker green than in C. vil- 

 losum, with two narrower brown-purple veins; in C. 

 lathamianum inversum, it is a much more yellowish 

 green than in C. villosum, and the brown-purple lines 

 at the very base of the veins are extremely faint. 



The lateral petals are linear oblong obtuse, and 

 slightly spatulate in C. villosum, smaller in C. spiceri- 

 anum than in C. villosum, and between the two parents 

 in both hybrids. The length, however, in both hybrids 

 is nearer that of C. villosum, but the width nearer that of 

 C. spicerianum. (Table J 52.) 



In C. spicerianum the petals are practically of the 

 same width for their whole length, but toward the apex 

 they may be slightly narrower than at the base. In C. 

 villosum they are very much narrower at the base than 

 across the apical half, in fact the latter is almost three 

 times the width of the base. In C. lathamianum they are 

 a little narrower at the base than near the apex, but 

 resemble C. spicerianum more than C. villosum. In C. 

 lathamianum inversum the apical width is greater than 

 the basal width, thus resembling 0. villosum more than 

 does C. lalhamianum, but still being nearer C. spiceri- 

 anum than C. villosum. 



The dorsal margin in C. spicerianum is crisped, the 

 ventral margin wavy. In 6'. villosum the margins are 

 merely undulating. In C. lathamianum the dorsal mar- 

 gin is nearly as crisped as in C. spicerianum, and con- 

 siderably more than in C. villosum. In C. lathamianum 

 inversum, the dorsal margin is also crisped, but not quite 

 as much as in C. latliamianum, appearing to be between 

 C. lathamianum and C. villosum. This character in 

 both hybrids is nearer C. spicerianum than C. villosum. 

 The color of the petals in G. spicerianum is green, 

 speckled with red-brown, with a midliue of red-purple, 

 and the petal is hairy at the base. In C. villosum the 

 petal is distinctly divided into halves by the mid-line of 

 reddish purple-brown. The upper half is of a darker 

 brown, the lower half more greenish, also hairy at the 

 base. In C. lathamianum the petal is also divided into 

 an upper and lower half by a reddish purple-brown mid- 

 rib. Upper part is of an olive-brown, deeper than in 

 C. villosum; the lower half more greenish (with a trace 

 of brown) than in C. villosum, and hairy at the base. In 

 C. lathamianum inversum the deep-purple mid-vein 

 (though not so deep in color as in C. villosum but wider 

 than in C. lathamianum) also divides the petal into 

 halves, the upper half being brownish, the lower half 

 yellowish green, more yellowish than in C. villosum or 

 C. lathamianum. 



The labellum is sac-bell-shaped, and smaller in C. 

 spicerianum than in C. villosum. In length it is in both 

 hybrids between the parents, though in C. lathamianum it 

 is nearer C. spicerianum, and in C. lathamianum inver- 

 sum nearer C. villosum. The width, measured across the 



widest part, is greater in both hybrids than in either 

 parent. (Table J 52.) 



The color of the outer surface of the labellum in 

 C. spicerianum is green at the base and olive-brown 

 toward the anterior rounded end. In C. villosum it is 

 yellowish green at the base, becoming brownish yellow 

 toward the anterior. In C. lathamianum it is more 

 greenish at the base than in C. villosum, becoming olive- 

 green toward the anterior, with brown veins, but not 

 as brown as in C. villosum. In C. lathamianum inversum 

 it is more yellowish at the base than in C. villosum, 

 rather a greenish orange-brown toward the anterior; 

 more yellowish than in C. lathamianum, but not as brown 

 as in (J. villosum. 



The color of the inside of the labellum in C. spiceri- 

 anum at the base is greenish, with purple hairs and 

 brownish-purple specks which become more numerous 

 toward the anterior until the whole anterior surface is a 

 solid brownish purple. In C. villosum at the base it is pale 

 yellow, with purple hairs and red-purple dots over the 

 veins, becoming greenish toward the anterior, with a 

 faint suggestion of brownish violet. In C. lathamianum 

 it is greenish yellow at the base, with purple hairs and 

 red specks over the veins which become smaller toward 

 the anterior which is of a dark greenish purple. In 

 C. lathamianum inversum it is deeper yellow at the base 

 than in C. villosum, with purple hairs and specks, be- 

 coming greenish yellow with larger purple specks toward 

 the anterior where it is orange-green, with reddish-brown 

 spots and veins. 



TABLE J 52. 



At the top of the short hairy column is the flat shield- 

 shaped staminode. This is very small and has a rather 

 wavy margin in C. spicerianum, and has no pointed apex. 

 At the posterior the margin bends in on each side to form 

 two infoldings that almost meet. In C. villosum the 

 stamiuode is larger, the margin is not wavy, the apex is 

 pointed, and there are no indentations at the posterior. 

 In C. lathamianum the shape of the staminode is about 

 mid-intermediate between those of C. spicerianum and C. 

 villosum; a pointed apex is present, but it is not as 

 acute as in C. villosum; and the posterior infoldings of 

 the margin appear to extend exactly one-half the distance 

 toward the interior, as they do in C. spicerianum. In 

 C. lathamianum inversum the staminode is in shape 

 nearer that of C. villosum than of C. spicerianum; a 

 pointed apex identical with that of C. lathamianum 

 is present ; and the posterior indentations extend in only 

 about one-fourth of the distance in C. spicerianum. The 



