9IO PATAGONIAN EXPEDITIONS: BOTANY. 



^3. Hermaphrodite. Perianth sepalo-petalous, and epigynous. Stamens 6. 

 Ovary 3-celled ; style 3-lobed ; seeds numerous. Epiphytes with scurfy 

 leaves. Tillandsia of Family 16. Bromeliacece, p. 293. 



d2. (Liliales.} As Farinales, but with mostly anatropous seeds, and fleshy, or carti- 

 laginous, or oily endosperm. Chiefly herbs, with 3-merous flowers, and 2-seriate 

 tepalous perianth. 

 e. Hypogynous, at least usually. 



/. Perianth-leaves glume-like. Stamens 6 or 3. 



Family 17. Juncaccce, Rushes, p. 295. 

 /2. Perianth-leaves usually large and petaloid. Stamens 6. 



Family 18. Liliacece, Lily, p. 303. 

 e2. Epigynous. Perianth usually petaloid. 



/. Style simple, or rarely 3-lobed. Stamens 6, on base of perianth. 



Family 19. Amaryllidacece, p. 309. 



/2. Style 3-cleft, its branches often flattened and petaloid. Stamens 3, on base 



of outer tepals. Family 20. Iridacecs, p. 312. 



</3. (Orchidales.} Typically 3-merous and 4-cyclic; stamens i, rarely 2, connate 



with the stigma. Perianth 2-seriate, both series petaloid, but differentiated ; 



the inner being very zygomorphic, and its posterior becoming its anterior 



from the torsion of the long inferior I -(rarely 3-) celled ovary. Seeds very 



many and very minute, without endosperm. 



Family 21. Orchidacece, Orchid, p. 320. 



BB. Class DICOTYLEDONES or Exogens. Having stem exogenous ; leaves reticulately 



veined, stipulate or estipulate ; flowers normally 5 4-merous, rarely 3 2-merous ; 



embryo with 2 cotyledons. Families 22-113, pp. 325-906. 



C. Subclass APETAL^E. Including families with naked or with monochlamydeous flowers ; 



a few are petaliferous, but with simple perianth. Families 22-31, pp. 325-354. 



d. (Salicales.} Flowers naked, dioecious, with cup-like or tooth-like disk. Stamens 



2 oo. Carpels 2, united. Ovary i -celled, with 2 parietal placentae, and many 



anatropous seeds, these having hairy plumes and no endosperm. Woody plants, 



with simple, alternate, mostly stipulate leaves. 



Family 22. Salicacece, Willow, p. 325. 

 d2. Flowers cyclic, rarely naked. Stamens mostly opposite the perianth-leaves. 



e. (Fagales.) Trees with alternate, stipulate leaves, and spicate, usually monoecious 



flowers. Male catkins globose. Carpels 26, connate ; seeds few, with no 



endosperm. Fruit burr-like. Family 23. Fagacece, Beech, p. 325. 



e2. (Urticales.) Herbs or woody, with alternate or opposite, stipulate leaves, and 



flowers small, clustered, 4- (2-5-) merous, often monoecious. No catkins. 



Filaments reflexed. Carpels 21, becoming a I -seeded nut. Seeds mostly 



with oily endosperm. Family 24. Urticacece, Nettle, p. 330. 



</3- Perianth cyclic, bract-like or petaloid, rarely differentiated into calyx and corolla. 



Flowers hermaphrodite or diclinous. . 



e. (Proteales.) Flowers usually 2-4-merous, the stamens hypogynously opposite 

 and adnate to the petaloid segments, only the anthers free. Carpel i ; seed 

 mostly i. Chiefly woody plants, with alternate, estipulate leaves. 



Family 25. Protcacece, p. 333. 



