818 



MACROSCOPIC AND MICROSCOPIC CHARACTERS OF PLANTS. 



of C. lathamianum inversum, however, being much nearer 

 C. spiccrianum, and that of C. lathamianum is much 

 nearer C. villosum. The amount of shortening, that is 

 the ratio of the short leaf to the regular length of leaf, 

 is in C. lathamianum exactly mid-intermediate (4:4), 

 while in C. lathamianum inversum it is identical with 

 that of C. spicerianum. (Tables J 50 and J 51.) 



C. spicerianum flowers much earlier than C. villosum, 

 those of the former opening in November, and those of 

 the latter in February. The hybrids flower at a time 

 between the times of the parents, in January but nearer 

 the flowering period of C. villosum. 



Flower-stalk. 



The flower-stalk is shorter in C. spicerianum than in 

 C. villosum. It is between the parents in both hybrids, 

 in C. lathamianum nearer C. villosum and in C. latha- 

 mianum inversum nearer C. spicerianum. (Table J 51.) 



The flower-stalk in C. spiccrianum No. 1 is brownish 

 purple and hairy.' (In 0. spicerianum No. 2 it is deep 

 purple at the base, becoming greenish purple toward the 

 top, and smooth except at the top where it is slightly 

 hairy. ) In C. villosum it is grassy green with long pur- 

 ple and colorless hairs. In C. lathamianum it is green 

 with purple specks, and with shorter hairs than jn C. 

 villosum. In C. lathamianum inversum it is green with 

 shorter purple hairs than in C. villosum. 



At the top of the flower-stalk is a bract which sur- 

 rounds the base of the ovary. It is linear-oblong and 

 compressed. It is shorter in C. spicerianum than in C. 

 villosum, and though between the two parents in both 

 hybrids it is much nearer C. spicerianum. It incloses 

 about half of the ovary in C. spicerianum; almost the 

 entire ovary in C. villosum; about one-half of the ovary 

 in C. lathamianum; and from one-third to one-half of 

 the ovary in C. lathamianum inversum. (Table J 51.) 



The bracts are green or yellowish green with purple 

 spots which are arranged somewhat differently in the 

 four plants. 



The ovary is 3-sided with 3 ridges. It is shorter in 

 C. spicerianum than in C. villosum. It is between those 

 of the parents in both hybrids, in C. lathamianum it being 

 almost mid-intermediate, and in C. lathamianum inver- 

 sum much nearer C. villosum. (Table J 51.) 



It is brownish purple and hairy in C. spicerianum No. 

 1. (In 0. spicerianum No. 2 it is purple, but smooth.) 

 In C. villosum the color is pale green with a few purple 

 specks, and there are many long purple hairs. In C. 

 lathamianum the color is a much darker green than in 

 C. villosum, with very many red-purple dots which are 

 close together on the flat faces and there are purple 

 hairs. In C. lathamianum inversum the green is lighter 

 than in C. lathamianum but darker than in C. villosum; 

 purple hairs are present, and also small purple dots 

 in less number than in G. lathamianum. 



The dorsal sepal is shorter and broader in C. spiceri- 

 anum than in C. villosum. In both hybrids the width is 

 greater than in either parent, and the length, though 

 between those of the parents, is in C. lathamianum 

 much nearer C. spicerianum, and in C. lathamianum in- 

 versum much nearer C. villosum. (Table J 51.) 



The ratio of length to width is between those of the 

 parents. In C. spicerianum the sepal is shorter than 

 wide ; in C. villosum, longer than wide ; in C. lathami- 

 anum, shorter than wide, but the difference is not so much 

 as in C. spicerianum ; and in C. lathamianum inversum, 

 longer than wide, though the difference is not so much as 

 in C. villosum. In C. spicerianum the base of the dorsal 

 sepal is broad and green with reddish hairs. Above this 

 it expands into a broad, pure white, obcordate blade 

 which is folded together along the midrib to form a ridge 

 having a reddish-purple color. The dorsal sepal is 

 strongly bent forward on each side of the apex. (In 

 C. spicerianum No. 2 the white area is tinted with pale- 

 pink lavender.) In G. villosum the entire base is colored 

 a deep red-brown, running up along the veins to the 

 middle of the sepal, the rest, except for a narrow white 

 margin, is a rather deep shade of green ; the margin 

 toward the apex is merely dented in, and does not form 

 a strong undulation as in C. spicerianum. In C. latha- 

 mianum the lateral margins are not recurved as much 

 as in (7. lathamianum inversum, thus making the sepal 

 appear much broader at the top. The basal greenish 

 area, speckled and striped with brown, does not extend 

 as far up the sepal as in C. lathamianum inversum, and 

 it gradually changes to pink. The white margin is 

 slightly deeper than in C. lathamianum inversum, and it 

 is also ridged and purple-red along the midrib. As a 

 whole, it appears to resemble C. spicerianum more than 

 C. villosum, although it gets the brown streaks and dots 

 at the base from C. villosum and the greenish area ex- 

 tends up further than in C. spicerianum. In C. lathami- 

 anum inversum the dorsal sepal resembles that of C. 

 lathamianum except that the shape is a little nearer that 

 of C. villosum, and the greenish basal area contains more 

 yellow and extends further up the sepal. 



The 2 lateral sepals of the true orchids are joined in 

 the Cypripediea; to form one anterior sepal placed directly 

 below the labellum. The anterior sepal is shorter and 

 slightly wider in C. spicerianum than in O. villosum. 



