KEY TO THE FAMILIES AND GENERA 



117 



ccc. Fruiting perianth enlarged, membranous 

 or scarious, colored, outer segms. 

 larger and broadly cordate, inner ones 

 oblong 



3. Antigonon. 



cccc. Fruiting perianth developing wings on 



the 3 outer parts 4. TYipioru. 



BB. Endosperm equable, entire. 



c. Perianth 5-merous, rarely 4-merous; 

 styles usually filiform and stigmas 

 usually capitate. 

 D. Pistil 2-3-merous; stamens usually 6-8: 



shrubs, often spinescent 5. Atrapkaxia. 



DD. Pistil 3-merous: stamens 8 or fewer: 



herbaceous, rarely suffruticose. 

 E. Nut entirely or nearly covered by 



the fruiting perianth 6. Polygonum. 



EE. Nut much longer than the fruiting 



perianth. 7. Fagopyrum. 



CC. Perianth 6-merous, rarely 4-merous^ 

 D. Stamens 9, rarely 6; fruiting perianth 



unchanged: nut 3- winged 8. Rheum. 



DD. Stamens 6, rarely 9; inner segms. of 

 fruiting perianth much enlarged, erect 



and including the 3-angled nut 9. Rumex. 



AA. The fls. in infl. dichotomously or umbellately 

 branched, the floral Ivs. or bracts connate 

 below the branches into one 3-cut bract, or 

 free and 3-<*> in number 10. Eriooonum. 



150. NEPENTHACE^:. 

 The only genus Nepenthes. 



BBB. The perianth-segms. deciduous from base, 

 fruiting tube flattened or disk-shaped and 



entire or truncate 4. Cinnamo- 



IAA. Anthers introrsely locellate; valves dehiscing [mum $ 



upward. [Camphora. 



B. Fls. in a short, lax raceme, accompanied by 



small and narrow bracts 5. Sassafras. 



BB. Fls. umbellate, capitate or rarely solitary; 

 umbels or heads before an thesis included 

 in a 4-6-bracted involucre. 



c. LocelUe of anther 4 6. UmbeUul- 



CC. Locellae 2. [aria. 



D. Stamens usually 9; fls. dioecious 7. Benzoin. 



DD. Stamens usually 12-20; fls. polygamous 8. Laurus. 



The genus Litsea is sparingly in cultivation. 



158. THYMEL^EACEjE. 



A. Stamens fewer than the corolla-lobes 1. Pimelea. 



AA. Stamens twice as many as corolla-lobes. 

 B. Disk or a very short ring. 



c. Perianth-tube cylindrical; limb spread- 

 ing 2. Daphne. 



cc. Perianth much swollen above, obliquely 



truncate; limb not spreading 3. Dirca. 



BB. Disk more or less lobed or oblique. 



c. Fls. 5-merous; disk cup-shaped 4. Dais. 



cc. Fls. 4-merous. 



D. The disk annular; lobes very short 5. Edgeworthia. 



DD. The disk 4-cut or 2-cut 6. Wikstramia. 



The genera Gnidia, Lagetta, and Thymelffia will also be found 

 in the book. 



151. ARISTOLOCHIACE^:. 



A. Perianth persistent, 3-lobed above ovary; 

 regular stamens 12 surrounding the. style in 



2 aeries; anthers free 1. Asarum. 



AA. Perianth deciduous, irregular, polymorphous; 

 anthers 6-co, adnate in 1 series to a stylar 

 column . . * 2. Aristolochia. 



152. SAURURACE-E. 



A. Stamens 3 1. Houtluynia. 



AA. Stamens 5-8. 



B. Carpels connate 2. Anemopsis. 



BB. Carpels distinct 3. Saururua. 



153. PIPERACE./E. 



A. Stamens 2-6; anther-cells usually distinct; 



stigmas 3-4, rarely 2 or 5 1. Piper. 



AA. Stamens 2, anther-cella confluent into one 

 2-valyed anther; stigma terminal or lateral, 

 penicillate or undivided 2. Peperomia. 



154. CHLORANTHACE^. 



In cultivation Chloranthus. 



159. PROTEACE.E. 



Series 1. Fr. an indehiscent nut or drupe: fls. usually solitary 

 with a bract under each one. 



A. Fls. dioecious by abortion, regular 1. Leucaden- 



dron. 

 AA. Fls. hermaphrodite, irregular 2. Protea. 



Series 2. Fr. follicular, capsular or rarely indehiscent and sub- 

 drupaceous : fls. usually in pairs along the rachis with only 1 bract 

 for each pair. 



A. Ovules 2, collateral. 

 B. Fls. racemose or fascicled; involucre none or 



inconspicuous; bracts deciduous. 

 C. The ovules pendulous, orthotropous. 

 D. Fr. scarcely or tardily dehiscent; 

 pericarp thick, fleshy or hard; seeds 

 with thick, often unequal cotyledons. 



E. Perianth-limb recurved 3. Guevina. 



EE. Perianth straight 4. Macadamia. 



DD. Fr. follicular or obliquely 2-valved; 



seeds compressed, margined or wing. . 5. Roupala. 

 cc. The ovules laterally affixed or ascending. 



D. Seeds with or without a narrow wing. . . 6. Greviltea. 

 DD. Seeds samara-like; wing oblong, ter- 

 minal 7. Hakea. 



BB. Fls. in dense bracted spikes or cones 8. Banksia. 



AA. Ovules 4 or more. 



B. Fls. umbellate : seeds winged below 9. Stenocarpus. 



BB. Fls. in dense racemes: seeds samara-like, 



with an oblong terminal wing 10. Teiopea. 



BBB. Fls. twin, in short or long racemes: seeds 

 samara-like with a terminal truncate 

 wing 11- Lomatia. 



155. MYRISTICACE-ffi. 

 Sole genus Mj/ristica. 



156. MONIMIACE^. 



A. Stamens numerous; anther-cells dehiscing in 



a 2-valved fashion by a longitudinal crack.. . 1. Peumus. 

 AA. Stamens C-12; anther-cells dehiscing above. .. 2. Lauretta, 



157. LAURACE-E. 



A. Anthers 2-loeellate, valves laterally dehiscent 



or quickly deciduous 1. Hemandia. 



AA. Anthers extrorsely locellate, valves dehiscent 



yip wards. 



B. The whole perianth persisting under the fr., 

 appresseu or slightly spreading; perianth 



sometimes deciduous from the base 2. Peraea 



BB. The perianth-segmH. at length transversely 



cut, leaving the fruiting tube bell-nhaped [mum. 



or expanded and G-toothed 3. Cinnamo- 



160. EL-/EAGNACE.S:. 



A. Lvs. alternate: stamens 4. 



B. Fls. hermaphrodite 1. Elxagnus. 



BB. Fls. unisexual, usually dioecious 2. HippophaS. 



AA. Lvs. opposite: stamens 8 3. Shcpherdia. 



161. LORANTHACE^. 



A. Perianth double 1. Loranthus. 



AA. Perianth single or simple 2. Phoraden- 



[dron, 



Viscum is also of general interest. 



162. SANTALACE.E. 



A. Plant herbaceous, low 1. Comandra. 



AA. Plant woody, shrubs or trees. 



H. Fls. perfect 2. Santalum. 



BB. Fls. dioecious or polygamous. 



r. Lvs. alternate 3. Pi/rufana. 



cc. Lvs. opposite 4. Buckleya. 



