ORCHIDACEAE. 



4. Habenaria nivea (Nutt. ) Spreng. 



Southern Small White Orchis. 



(Fig. 1099.) 



Orchis nivea Nutt. Gen. 2: 188. 1818. 

 Habenaria nivea Spreng. S5'st. 3: 689. 



1826. 



5. Habenaria hyperborea (I,.) R. Br. 

 Tall Leafy Green Orchis. (Fig. uoo.) 



Orchis hyperborea L. Mant. 121. 1767. 



Habenaria hyperborea R. Br. in Ait. Hort. Kew. Ed. 

 2, 5: 193. 1813. 



Stem rather stout, '-3 high. Leaves lanceo- 

 late, mostly acute, 2 / -i2 / long, 6 // -i8 // wide; spike 

 narrow, $'-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. 





Stem slender, angled, I2'-I5' high. Leaves 

 linear-lanceolate, acuminate, 4 / -S / 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. 





6. Habenaria dilatata (Pursh) Hook. 

 Tall White Bog Orchis. (Fig. noi.) 



Orchis dilatata Pursh, Fl. Am. Sept. 588. 1814. 

 Habenaria dilatata Hook. Exot. Fl. 2: pi. 95. 



Stem slender, leafy, i-2 high. Leaves lanceo- 

 late, 3 / -i2 / long, 3 // -io // wide, obtuse or acute; 

 spike 2 / -io / 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, sQiith 

 to Maine, New York, Utah and Oregon. Ascends to 

 5000 ft. in New Hampshire. June-Sept. 



