EXOGENS. 53 



rowed. J. nigra, Black Walnut. 70°-90° high. Nut large, de- 

 licious. Wood valuable, deep violet color. Mid. States, W. and S. 

 J. cinirea, Butternut. 40°-50° high. Nut oblong, sweet. Wood 

 red, valuable. Can. to Ga., W. J. regia, Eoyal (called English) 

 Walnut. 60°-80° high. Nut large, oblong, delicious ; endooarp 

 thin, with few furrows. Native of Persia, but naturalized throughout 

 Eur. Sacred to Diana ; the Jove's Nut of the Romans, Basilioon 

 (royal) nut of the Greeks. Branch with Ivs., fls., fr.. Pig. 67. 



Aristolochia Alliance.— 6. Rafflesiaceae. 7. Aristolochiaceae. 

 Emb. undivided, or cotyledons minute. Perisperm or present. 



Ord. 6. Rafflesiacese.— Pis. ? c? or g , mono- or dichlamyd., 3-4- 

 5-merous. Sta. oo. Ova. 1-celled ; ov. oc. Emb. undivided. Pr. inde- 

 hisc, dry or fleshy. Parasites, often nothing but a fi. and rts. ; with 

 scent of tainted meat. In both worlds. 4 Tribes ; types given here : 



Tribe 1. Apodanthes. Pr. a berry ; perisperm 0. Sev. spec, small, 

 parasitic on stems of Leguminosse — Inga, etc. Guiana. Tribe 3. Cyt- 

 inus. Pr. a berry, on roots. Mediterranean region. Am., S. Af Tribe 3. 

 Hydnora, Jackal's KosT. Pr. fleshy. Boots of Euphorbia. S. Af. 

 Eaten by natives. Tribe 4. RafSesia. ? cf , large, 5-merous. De- 

 scribed, Lesson XI. Pr. fleshy. 3 or 4 species, on rts. of Vines. Ind. 

 Archipel. R. Arnoldi, in Sumatra. Pig. 68. Called by natives 

 Ambun-Ambun — WoNDKK- Wonder. 



Ord. t. Aristolochiaceae. — Pis. g , monochlamyd. ; perianth usually 

 large, colored. Infl. various. Sta. gynand. Ova. 6-4-celled, fr. a boll 

 or a berrj', oo-seeded. Perisperm copious. Herbaceous plants ; rhizo- 

 mous, or shrubs. Lvs. simple, various in form. 3 Tribes ; types given : 



Tribe 1. Boll oblong or globose, 6-valved. Aristolochia. Shrubs, 

 usually climbing. Lvs. usually cordate ; fls. large, tubular, often 

 handsome. Many fine species, usually tropical, both worlds. A. Ser- 

 penidria, Snakeroot, low erect herb. PI. purple, twice bent. Penn. 

 to 111. and La. Pig. 180. A. Sipho, Dutchman's Pipe. Shrubby 

 twiner, climbing to a height of 40°. PI. sol., brown, like a tobacco- 

 pipe ; lvs. large, ornamental. Penn. Ky . , S. A. grandifldra, twiner, 

 fl. immense, limb spreading, mottled, tailed. W. Ind. A. cor- 

 ddta, fls. 4° in circumference, playfully worn as bonnets by chil- 

 dren. N. Granada. Tribe 2. Boll siliquose, 4-valved. Bragantia. 

 Perianth limb 3-eleft. Undershrubs, rts. bitter, medicinal. Sev. spec, 

 trop. Asia. Tribe 3. Boll 6-valved, fleshy. Perianth 3-oleft, pur- 

 plish. Lvs. reniform. Herbs, with perenn. rhiz. Asarum. Sev. spec. 

 Eu., Asia, N. Am. A. eurcy/rrram, Asarabacca. N. Eur.,Eng. A. 

 ca.na(iere.se, WiLB GiNOBR. Can. toGa.,W. Sd.,Pig. 195, B. A.vir- 

 ginicum, Mts., Va. to Ky., Ga. A. arifblium, Va. to Pla. and La. 



Subdivision II. — Ova. free, rareiy adh. Perianth usually distinct. 



Nepenthes Alliance. — 8. Nepenthacese. Characters of Order. 



Ord. 8. Nepenthaceae.* — 9 ^, monochlamyd. 4-merous. Infl. 

 racemose. Sta. monadelphous. Ova. free. Ov, oo. Boll 4-celled, 

 4-valved. Suflrutescent plants. Stem prostrate or sarmentose. Lf. 

 transformed into a pitcher, described Lesson XVI. Only genus. 

 Nepenthes, Pitcher Plant. 20 spec. Insectivorous. Borneo, 

 Sumatra, adjacent islands of Ind. Arch., China, Ceylon, Madagas- 

 car. N. distillatbria, Ceylon. Pig. 113. N. Edvmrdsiana, pitchers 

 18' long, elegantly colored. Singapore, Malacca, Sumatra, Borneo. 



