322 OKCHIDACEAE 



Flowers in a terminal spike or raceme. Perianth showy. Sepals and lateral petals similar 

 or the latter narrower or broader, distinct, spreading. Lip spreading, dilated, stalked, 

 bearded on the upper surface, with club-shaped hairs. Column elongated, incurved, 2- 

 winged above. Anther terminal, sessile, lid-like. Pollen-masses 2, one in each sac, 

 loosely granular. Capsules erect. [Cakopogon K. Br.] GRASS-PINK. 



Bracfs as long as the ovaries or only slightly shorter. 



Middle sepal and petals less than 1.5 cm. long : petals acute. 



Petals ovate : lip conspicuously mucronate. 1. L. mtiMfiorum. 



Petals linear-lanceolate : lip barely mucronate. 2. L. pnllidum. 



Middle sepal and petals over 2 cm. long : petals obtuse. 3. L. Simpsatiii. 



Bracts much shorter than the ovaries. 



Blade of lip much broader than long : hairs of the crest decurrent on the claw. 4. L. tubcrosum. 

 Blade of lip barely broader than long : hairs of the crest not decurreiit. 5. L. graminijolium. 



1. Limodorum multiflonim (Lindl. ) Mohr. Leaves usually 2, basal, 8-15 cm. long, 

 sheathing at the base ; blades linear, acuminate : scapes 2-4 dm. tall, slender, sometimes 

 zigzag : spike continuous, 7-14-flowered : bracts about as long as the ovaries : perianth 

 deep purple: lateral sepals obliquely ovate, 10-12 mm. long : lateral petals ovate, acute: 

 lip with a broadly cuneate blade, about 1 cm. long, notched and mucronate at the apex, 

 crested in the middle with a beard of slender hairs. 



In low pine lands, peninsular Florida. 



2. Limodorum pdllldum (Chapm.) Mohr. Leaves solitary, basal, 1-3 dm. long; 

 Hades narrowly linear, attenuate, acute, accompanied by 1 or 2 sheathing scales at the 

 base : scapes 2-5 dm. tall, slender : spike interrupted, 8-20-flowered : perianth white tinged 

 with purple : lateral sepals oblong or obovate, 11-13 mm. long, acuminate : lateral petals 

 linear or linear-lanceolate, longer than the sepals, acute : lip with a cuneate-flabellate blade, 

 6-8 mm. long, barely mucronate, crested with purplish hairs : capsules oblong or oblong- 

 clavate, 1.5 cm. long. 



In low pine lands, North Carolina to Florida and Alabama. Spring. 



3. Limodorum Simpsonii (Chapm.) Small. Leaves basal, usually solitary ; blades 

 narrow, linear, 3-4 dm. long, erect, finely ribbed : scapes 5-7 dm. tall, slender, wand- 

 like : spike few-flowered, soon interrupted : bracts about as long as the ovaries : perianth 

 purple : lateral sepals obliquely oblong-ovate, fully 1.5 cm. long, acuminate ; middle sepal 

 oblong, about 2 cm. long, acuminate : lateral petals oblong-ovate, 2.3-2.5 cm. long, ob- 

 tuse : lip about 1 cm. long, densely bearded near the apex, the hairs club-shaped : column 

 1.2 cm. long, curved. 



In low pine lands, peninsular Florida. Spring aud summer. 



4. Limodorum tuberosum L. Leaf usually solitary, basal ; blades linear to 

 narrowly oblong, 1-4 cm. long, acute : scape solitary, 2-9 dm. tall, straight or curved : 

 spike 10-40 cm. long, 3-22-flowered, not dense : perianth pink-purple : bracts much shorter 

 than the ovaries, acute : lateral sepals ovate-oblong, fully 1.5 cm. long, oblique, acute : 

 lateral petals lanceolate or oblong, surpassing the lateral sepals: lip fully 1.5 cm. lonir, 

 with a fan-shaped blade, erose or crenulate at the apex, crested with pink, yellow or 

 orange hairs, these decurrent on the claw : capsule oblong, 2-2.5 cm. long. [Calopogon 

 pulcheltus K. Br.] 



In swamps and meadows, Newfoundland to Minnesota, Florida and Missouri. Spring and sum- 

 mer. 



5. Limodorum graminifolium (Ell.) Small. Leaf solitary, basal, but accom- 

 panied by 1 or 2 sheathing scales, 1-2 dm. long ; blades narrowly linear, acute, often 

 little broader than thick: scapes wire-like, 1.5-4 dm. tall: spike barely interrupted, 3-7- 

 flowered : bracts much shorter than the ovaries : perianth bright purple : lateral sepals 

 elliptic-oblong, about 1 cm. long, acuminate : lateral petals oblong, surpassing the lateral 

 sepals, rather obtuse : lip with a broadly cuneate-obovate blade, barely broader than long, 

 crested with yellow hairs ; the claw glabrous. [ Calopogon parviflorus Lindl.] 



In low pine lands, North Carolina to Florida. Spring. 



19. ISOTRIA Raf. 



Scapose herbs, with elongated fleshy-fibrous roots. Leaves reduced to several scales at 

 the base of the scape. Scape solitary, topped by a whorl of several spreading leaf-like 

 bracts. Flowers solitary or 2 together at the top of the scape, pedicelled. Perianth dusky 

 purple or greenish, erect or ascending. Sepals narrow, nearly equal, sometimes much 

 elongated. Lateral petals narrow, shorter than the sepals. Lip slightly 3-lobed, spurless, 



