4, ^> 



xxxvni 



LINN.5^AN METHOD. 



^ 



22 



2 



o 



single, inferior, multipartite. Stam. 16 — 20. Germen 1, 

 superior. Style filiform and stigma simple, rruit inde- 

 hiscent, l-seeded„ p. 382. 



MTRioriiYLLUM. Flowers axillary or in a lax spike. — Barren 



fl. : Cal. inferior, of 4 leaves. Pet. 4, deciduous. Stam. 8 



Fertile fl. : Cal. of 4 leaves. Pet. 4. Germen inferior. Stigmas 

 4, sessile. Fruit splitting into 4 achcnes. p. 148. 



Sagittakia. Flowers solitary, peduncled. Perianth of 6 leaves; 

 3 outer herbaceous, 3 inner petaloid. Stam, numerous. Ger- 

 mens very numerous, collected into a head, each with one 

 style and stigma. Achenes compressed, p. 471. 



■ r 



JJ Leaves with stipules adhering to the petiole. 



24. PoTERiuM. Flowers collected into a head, upper ones fertile. 



Perianth single ; of barren fl. in 4 deep segments, of fertile fl. 

 tubular and contracted at the mouth with 4 deciduous teeth. 

 Stam. 30 — 40 ; filaments very long, flaccid. Gcrmens 2. 

 Stigmas tufted. Achenes 2, invested with the hardened pe- 

 rianth, p. 135. 



ft Flowers with a spatha and spadix. 



25. Arum. Spatha of 1 leaf, convolute at the base. Perianth 0. 



Spadix thick, naked above, with germens at its base and ses- 

 sile stamens near the middle. Berry 1 -celled, many-seeded. 



p. 475, 



** Barren flowers in catkins or lax spikes. 



26. CUPTJLIFER^. Fertile fl. solitary or aggregated or spiked. 



Perianth, when present, adhering to the rounded germen. 

 Fruit solitary, or several together within a coriaceous or leafy 

 involucre, not winged, p. 412. 



27. Betula. Fertile flowers in cylindrical catkins. Germen and 



fruit compressed, winged, not contained within an involucre, 



p. 389. 



28. 



29. 



Ord. VII. MoNADELPHiA. Stamens united in one set. 



Xa^thium. Barren fl. capitate, seated upon a common recep- 

 tacle. Perianth single, 5-toothed. Filaments united into a 

 compact tube, inserted into the bottom of the perianth, and 

 bearing 5 anthers at the summit. — Fert. fl. : Involucre of 1 

 piece, prickly, 2-beaked, inclosing 2, 1-seeded pistils without 

 a perianth. Stigmas protruded, p. 256. . ^ 



PiNus. Perianth 0. — Barren fl. in ciWded racemose catkins; 

 the scales peltate, bearing 2, 1 -celled sessile anthers.— Fertile 

 fl. in an ovate catkin; in scales closely imbricated, 2-flowered, 

 afterwards hardened and forming a cone (strobilusX Pericarp 

 none (except the scales of the cone). Seeds terminated by -^ 

 long winged appendage, placed by pairs on the upper surface 



of each scale, p. 417. 



^ 



% 





