478 PAPERS ON GENTIANE. 
3. Lantana with species 8-11; leaves finely or coarsely dentate, glabrous or often with stellate 
pubescence, cymes even or, rarely, radiate, berries bluish-black, stones strongly marked, compressed or 
tumid. This section might be subdivided according to the form of the stones above described. 
4, Tinus with species 12-15; leaves perennial (always?), entire or minutely sinuate- [271] 
toothed, cymes even, berries purple or black, often shining, stones tumid with ruminated 
albumen. 
In explanation of the measurements given in the above table he would add, that he had, in 
conformity with the usage now almost universal among men of science, adopted the French decimal 
measure, and hoped it would supersede, even in common life, the inconvenient measure of feet, 
inches, and lines. For those not familiar with it, it will suffice to state that the millimetre is about 
equal to half a line. 
Dr. Engelmann had observed similar, though not as strongly marked differences in the fruits 
and stones of the different species of Cornus. Thus, the stone of our common C. asperifolia (a small 
tree with us) is subglobose, small, nearly smooth, marked with very slight furrows; the eastern C. 
circinata has larger stones, marked by indistinct undulations; the low, shrubby C. sericea of our 
swamps bears a stone twice as large, and quite knotty, with thick ridges; our Dogwood, C. florida, 
has a larger and elongated stone, acute at both ends, and slightly grooved; the stone of the nearly 
allied Californian Cornus Nuttallii is still larger, obtuse at both ends, and scarcely grooved, and that 
of the northern C. Canadensis is from a rounded base elongated to a pointed tip, and is perfectly 
smooth. He solicited botanists to furnish him with ripe fruit of any species of Viburnum and 
Cornus within their reach, so as to enable him to prosecute these investigations. 
VIL PAPERS ON GENTIANEA 
NEW SPECIES OF GENTIANA, FROM THE ALPINE REGIONS OF THE ROCKY MOUNTAINS. 
FroM THE TRANSACTIONS OF THE St. Lovis AcapEMy oF Science, Vou. IL. 1862 (DisrrisurEp May 5, 1863). 
GENTIANA (AMARELLA) AcUTA, Michz., var. NANA. : pusilla, subsimplex ; calycis 4-5-fidi lobis inequali- [214] 
bus tubum corollz ccernleo-virescentis equantibus ; hachitis corolle fauce ciliis paucis ornate ovatis obtusis 
On alpine slopes, together with G. prostrata in mats of Silene acaulis ; Parry, No. 309. — Stems 13-2 inches high, 
flowers 4-5 lines long; distinguished from the ordinary form by the short and broad lobes of the palin: which bear 
a few (1-4) single cilia at their base, and by the short oval anthers. 
G. acuta is evidently: but a form, a geographical variety of G. Amarella, as Dr. Hooker has indicated, and which 
is confirmed by our dwarf variety and other forms collected in Colorado by Messrs. Hall & Harbour (No. igh ; the 
characters of acutish lobes of the corolla and small seeds do not hold good ; Dr. Parry’s No. 307 has see 
large as (7. Amarella from Prussia, and several forms have quite obtuse lobes. I have even some doubts ea [215] 
the specific difference of G. tenuis, which is characterized by smaller flowers, short, obtuse or retuse lobes of the 
corolla with sparing fringes, and (in my specimens) very indistinct glands at the base : specimens of G. acuta, with 
strictly erect branches, smaller, greenish flowers, and small seeds, seem to approach it almost too closely. 
Pl. 9, Fig. 6, represents two specimens of our plant ; 7, a flower ; 8, corolla laid open; 9, pistil. Fig. 7-9, 
4 times magnified. 
GENTIANA (AMARELLA) HETEROSEPALA, 7. sp.: annua, humilis, erecta, simplex, pauciflora, glabra ; foliis infimis 
obovato-spatulatis, superioribus ovatis basi lata sessilibus obtusis seu subacutis margine (sub lente) scabrellis ; floribus 
singulis breviter pedunculatis ; calycis 5-fidi lobis 2 maximis ovatis acutis corollas | fere eequantibus, reliquis 3 breviori- 
bus lineari-subulatis ; corolla basi indistincte glandulifere fauce ciliis paucis barbate laciniis lineari-oblongis obtusis 
tubum dimidium souvetibine patulis ; antheris ovato cordatis; pistillo lineari. 
Northern slope of the Uintah Mountains, east of the Great Salt Lake; beginning to flower at the end of August ; 
H. Engelmann, in Capt. Simpson’s Exped., 1859. — A very slender plant, 2-4 inches high, usually with 4 pairs of 
leaves of a delicate pale green color, the larger ones 6-10 lines long, 4—5 lines wide ; flowers 6 lines Jong, pale grayish- 
blue ; cilie of throat few, in two fascicles at the base of each bie Remarkable for the great disparity of the calyx 
eae 
