462 ORCHIDACEAE. 
4. Habenaria nivea (Nutt.) Spreng. 
Southern Small White Orchis. 
(Fig. 1099.) 
Orchis nivea Nutt. Gen, 2: 188. 1818. 
Habenaria nivea Spreng. Syst. 3: 689. 1826. 
Stem slender, angled, 12/-15’ high. Leaves 
linear-lanceolate, acuminate, 4’-8’ long, the upper 
much shorter and passing into the bracts of the 
spike; spike 2’-4’ long, loosely many-flowered; 
flowers small, white; lateral sepals broadly oblong, 
dilated or slightly eared at the base, spreading, 
about 3’ long; petals and upper sepal smaller; 
spur capillary, as long as the ovary or longer; 
stigma appendaged by 2 small horns affixed to the 
back of the anther; ovary straight. 
In pine barren bogs, Delaware to Florida and Ala- 
bama. Aug. 
5. Habenaria hyperborea (I,.) R. Br. 
Tall Leafy Green Orchis. (Fig. 1100.) 
Orchis hyperborea I, Mant. 121. 1767. 
Habenaria hyperborea R. Br. in Ait. Hort. Kew. Ed. 
2,5:193. 1813. 
Stem rather stout, 8’-3° high. Leaves lanceo- 
late, mostly acute, 2’-12/ long, 6’’-18’’ wide; spike 
narrow, 3/-8’ long; flowers small, greenish or 
greenish yellow; sepals and petals ovate, obtuse, 
2//-3/ long; upper sepal slightly crenulate at the 
apex; lip lanceolate, entire, obtuse, about 3’” long; 
spur about equalling the lip, shorter than the 
ovary, blunt, slightly incurved, sometimes clavate; 
anther-sacs parallel, diverging at the base; glands 
small; ovary more or less twisted. 
In bogs and wet woods, Nova Scotia to Alaska, south 
to New Jersey, Colorado and Oregon. Ascends to 4000 
ft. in Vermont. May-Aug. 
6. Habenaria dilatata (Pursh) Hook. 
Tall White Bog Orchis. (Fig. r1or.) 
Orchis dilatata Pursh, Fl. Am. Sept. 588. 1814. 
Habenaria dilatata Hook. Exot. Fl. 2: pl. 95. 1825. 
Stem slender, leafy, 1°-2° high. Leaves lanceo- 
late, 3/-12’ long, 3/’-10’’ wide, obtuse or acute; 
spike 2/10’ long; bracts acute, the lower longer 
than the ovary, the upper shorter; flowers small, 
white; sepals ovate, obtuse, nearly 3’’ long; lip en- 
tire, dilated or obtusely 3-lobed at the base, obtuse 
at the apex, about as long as the blunt incurved 
spur; anther-sacs nearly parallel; glands close to- 
gether, strap-shaped, nearly as long as the pollinia 
and caudicle; stigma with a trowel-shaped beak be- 
tween the bases of the anther-sacs; ovary more or 
less twisted. 
In bogs and wet woods, Nova Scotia to Alaska, south 
to Maine, New York, Utah and Oregon. Ascends to 
5000 ft. in New Hampshire. June-Sept. 
