LlMNORCHIS AND PlPERIA NORTH OF MEXICO 635 



section of Habcnaria which now constitutes Linnwrchis, but his de- 

 scription of the flower is the best hitherto given of any species o 



Pi peri a. 



Synopsis of Species 



Spur less than twice as long as the lip. 



Stem leafy only at the base ; lip oblong ; spur slender, slightly exceeding the 

 ]j p I. P. UnalascJiensis. 



Stem more or less leafy ; lip ovate. 



Spur slightly exceeding the lip, very saccate. 2. P. Coopen. 



Spur nearly twice as long as the lip, only slightly clavate. 



3. P. land folia. 



Spur 2-3 times as long as the lip, filiform. 

 Lip linear to lanceolate. 



Spike very lax ; lip 4-5 mm. long ; spur about 8-10 mm. 



4. P. leptopetala. 



Spike dense ; lip about 6 mm. long ; spur 15-18 mm. long. 



5. P. muHiflora. 



Lip ovate or ovate-lanceolate. 



Spike elongated, lax ; leaves withering at anthesis. 



Bracts linear-lanceolate ; stem leafy only at the base. 



6. P. e'egans. 



Bracts ovate-lanceolate ; stem usually leafy. 7- p - longispica. 



Spike short and very dense ; flowers crowded ; leaves withering before 



anthesis. 

 Petals and sepals about 4 mm. long ; petals purplish or greenish. 



8. P. Michaeli. 



Petals and sepals about 5 mm. long ; petals white. 9. P. maritima. 



. PiPERiA Unalaschensis (Spreng.) Rydb. Bull. Torr. Club, 28 : 



270. 1 90 1 

 Spiranthes Unalaschensis Spreng. Syst. 3 : 708. 1826; Habc 



1 



# 



29. 1828; Her murium 



Unalaschkcnsc Relchenb. Fl. Germ. 13 : 107. //. 65; Platan the ra 



m 



286. 1835; Habe 



naria foctida S. Wats. Bot. King's Exped. 5: 341- l8 7» 5 PIa( - 

 nnthera foctida Geyer. as a synonym under the preceding; 

 Habcnaria JTnnlasrhensis Wats. Proc. Am. Acad. 12 : 277. 1877; 



M 



Stem strict, slender, 3-5 dm. high, leafy only near the base : 

 basal leaves oblanceolate, obtuse or acutish, 1-1.5 dm. long, .8-3 

 cm. wide, withering at anthesis or soon after ; stem leaves bract- 

 like, linear-lanceolate to lanceolate, attenuate, .5-1 cm. long : spike 

 long and lax, 1-3 dm. long ; bracts lanceolate to ovate-lanceolate, 



