ORCHIDACEJE. 305 



SUBCLASS II. MONOCOTYLEDONOUS OB ENDOGENOUS 

 PLANTS. 



Embryo with but one cotyledon. Leaves parallel-veined. Flowers 

 having their parts mostly in threes. 



DIVISION I. CALYCES PEEIGYN^. 



Perianth with tube adnate to the ovary, the stamens consequently 

 perigynous, or else (as in the first order) gynandrous. 



ORDER LXXXVIIL ORCHIDACE,4E. 



Perennial herbs, the roots mostly few and very fleshy fibrous, or still 

 more fleshy and tuberiform. Flowers usually inverted by a twist in the 

 long ovary, the sepals and 2 lateral petals similar, the third and supe- 

 rior petal (apparently the lower) unlike the others and called the lip. 

 Stamens coherent with the style and with it forming the column, with 

 usually only the anther opposite the lower sepal perfect, and 2 rudimen- 

 tary lateral ones; anthers 2-celled; pollen more or less coherent in 1 4 

 waxy masses. Stigma oblique, concave. Capsule dehiscing by 3 placen- 

 tiferous valves. Seeds many, minu.te, resembling saw-dust. 



Stem with ample leaves; flowers few, not small LIMODOKUM 1 



Stem-leaves few, small; fl. many, email, spicate; 



Lip undulate, not spurred at base ORCHIASTRUM 2 



" with a long spur at base HABENAIUA 3 



Plants leafless and destitute of chlorphyll CORALLORHIZ A 4 



1. LIMODORUM, Clusius. Caulescent and leafy, erect, from creeping 

 rootstocks. Flowers few, in a terminal conspicuously leafy-bracted 

 raceme. Perianth spreading; sepals and petals subequal: lip free, 

 deeply concave at base, narrowly constricted and somewhat jointed in 

 the middle, the upper part petaloid-dilated. Anther 1, sessile behind 

 the broad truncate stigma, 2-celled, obtuse; pollen-masses becoming 

 attached above to the gland capping the small rounded beak of the 

 stigma. 



1. L. giganteum (Dougl.), O. Ktze. Stoutish, 14 ft high, almost 

 glabrous: leaves ovate below, lanceolate above, 38 in. long, acute or 

 acuminate, somewhat scabrous on the veins beneath: fl. 3 10, greenish 

 strongly veined with purple, on short pedicels; sepals ovate-lanceolate, 

 68 lines long, the upper concave; petals a little smaller; lip as long, 

 the saccate base with erect wing-like margins, the dilated summit ovate- 

 lanceolate, entire, somewhat wavy-crested. Moist ground, Marin Co. 



2. ORCHIASTRUM, Micheli. Stems leafy below, from fascicled 

 tuberiform roots. Flowers small, in a 1 3-ranked spirally twisted spike. 

 Lateral sepals somewhat decurrent; the upper and the petals coherent: 



