480 



ORCHIDACEAE 



1. Ophrys convallarioides (S\v.) 

 W. F. Wight. 



Broad-lipped Twayblade. Fig. 1173. 



Epipactis con-L-allarioidcs Sw. Kongl. Vet. Acad. Handl. II. 



21: 2i2. 1800. 

 LIstcia con7.'anayioic!cs Torr. Comp. 320. 1826. 

 Ophrvs convallarioides W. F. Wight, Bull. Torrev Club 32: 



380. 1905. 



Stem slender, 10-25 cm. high, glandular-pubescent 



above the leaves. Leaves round oval or ovate, 3-5 cm. 



long, obtuse or cuspidate at apex, slightly cordate at 



base ; glabrous, 3-9-nerved ; raceme i-7 cm. long, 



densely 3-15-flowered ; flowers greenish yellow, on 



slender bracted pedicels 6-8 mm. long ; sepals and 



petals linear lanceolate, much shorter than the lip ; 



lip broadly wedge-shaped about 9 mm. long, with 2 



obtuse lobes at the dilated apex, generally with a 



tooth on each side at base ; column elongated, 5 mm. 



long, with 2 short rings above the middle ; ovary 



glandular,- pubescent ; capsule about 6 mm. long. 



Moist shady places, Canadian Zone; Alaska to Newfound- 

 land, south to southern California, Michigan and Vermont. 

 Tune-Aug. Type locality: "E. Terra Nova Amer. Sept." 



2. Ophrys caurina (Piper) Rydb. 

 Northwestern Twayblade 



Fig. 1174. 



Listcra caurina Piper, Erythea 6: 32. 1898. 



Listcra retiisa Suksdorf, Deutsch. Bot. Monatss. 18: 155. 1900. 



Ophrys caurina Rydb. Bull. Torrey Club 32: 610. 1905. 



Stem slender, 10-30 cm. high, glandular-pubescent 

 above the leaves. Leaves sessile by a clasping base, 

 ovate, obtuse or acutish, 3-5 cm. long, glabrous ; racem-^s 

 S-40-flowered ; pedicels 5-7 mm. long ; sepals and petals 

 lanceolate spreading, not reflexed in anthesis, greenish; 

 lip 4 mm. long, cuneate, obovate, with an inconspicuous 

 tooth between the 2 shallow notches at apex, and a small 

 tooth on each side near the base ; column stout, 2 mm. 

 long; ovary glabrous; capsule glabrous, ovoid, 5-6 mm. 

 long. 



Moist shady places, Canadian Zone; British Columbia to the 

 Siskiyou Mountains, southern Oregon, east to Idaho and Mon- 

 tana. June-Aug. Type locality: "Cascade Mountains at about 

 3000 ft. altitude," Washington. 



3. Ophrys cordata L. 



Heart-leaved Twayblade. Fis'. 1175. 



ophrys cordata L. Sp. PL 2: 946. 1753. 



Listcra cordata R. Br. in Ait. Hort. Kew. ed. 2. 5: 201. 

 1813. 



Listcra ncphrophvlla Rydb. Mem. N. Y. Bot. Gard. 1: 108. 

 1900. 



Stem slender, glabrous or sparsely glandular- 

 pubescent above the leaves. Leaves sessile, ovate, 

 cordate, mucronate, 15-30 mm. long; racemes 

 loosely 4-20-flowered ; pedicels slender, 2 mm. 

 long, twice the length of the bracts; sepals and 

 petals greenish purple, oblong-linear, scarcely 2 

 mm. long; lip narrow, often with subulate teeth on 

 each side at base, the segments setaceous and 

 ciliolate; column scarcely over 1 mm. long; ovary 

 glabrous ; capsule ovoid, 4 mm. long. 



Moist woods. Humid Transition and Canadian Zones; 

 Alaska to Labrador, south to Oregon, Colorado, Michigan 

 and New Jersey, also in Europe and Asia. June-Aug. 

 Type locality: Europe. 



