UX1 



KEY TO THE FAMILIES AND GENERA 



89. LOASACE^. 



A. P«"I«U> hOOllwl. , , r_,„ 



B Caps'. 3-5-valvi>.lsraiH>\. rarely twiatod.... I. L,oai>a. 

 BB.Caivs.lonKitiulu.ally -.lO-valviHl. u.sually ^ Blumen- 



A.t. Petals not hooded. . 



B. Seeds very numerous, arranRed in many 



.*ries. . V • • ■ .-, *• ^"<■""''•• 



BB. Seeds few or. if numerous, arranged m . 



series 5. Menl:,lm. 



2. Cyclanthera Tribe. 

 K Fr. oblique, Ribbous, rnplurinK ohisti.-ally. ... 19. C l/cl.mthera. 

 aa! Fr. not gibbous, opening by 1 or 2 p.iros at the - 



top or by irregular rupture (i^e-L-Mega'rrhiz ") 



3. Abobra Tribe. 



Anther-cells fiexuous; stamens free 



.21. .■I(w6ra. 



90. PASSIFLORACE.ffi. 



A. Hypanthium long; petal.i and stamens 5 . . . . 1. Tac.^nnia. 

 AA. H"j-panthium short: petals 4-5, rarely 0; .- 



stamens 4-5 ^. \.,' ,J 



•. vA. Hj-panthium medium or short; Bs. unisexual. 3. Modecca. 



4. Sicyos Tribe. 



Fls. S-merous, monoecious: fr. fleshy 22. Sechium. 



The genera Actinostemma, Gurania, Herpetospermum. Hodg- 

 sonia and Sicyos are sometimes cultivated. 



91. CARICACEiE. 



In cultivation 



Carira. 



92. CUCURBITACE.ffi. 

 /. Summary of Tribes. 



A Series 1. Ovules horizontal . . . 1. Cocuhbita Tribe. 



AA. Series 2. Ovules erect or ascending, 



rarely horizontal „ „ 



B. Fr. mptures elastically 2. Cvclanthera^^_^_^ 



BB. Fr. does not rupture elasticaUy 3. Abobra Thibe. 



iAA. Series 3. Ovules pendulous *• Sieves Tribe. 



//. Key to the Tribes. 



1. Cucurbita Tribe. 



A.AntherK«Ui. straight, rarely curved, "o' y^,„„,^;„ 



fiexuous ,'■■,■•' 'i* 



AA. Anther-cells fiexuous or eonduplicate. , 

 B. Corolla bell-shaped, 5-lobed to the middle 



or a little below. 



c. Anthers free 2. Sicana. 



cc. Anthers coherent. Crrinia 



D. Filaments connate f ^"'^'^'"/f- 



DD. Filaments free . . ..... ■■■■■•*■ Cucurlnla. 



BB. Corolla rotate and 5-petaled or bell-shaped 

 and 5-parted to the base. 

 c. Petals fimbriate or tendril-bearing. , „ ,, 



D. Seeds large, fibrou.s 5. ™/a»™ 



DD. Seeds small, not fibrous 6. Tnchmui 



cc. Petals entire. , „ , ., 



D Hypanthium of male fls. long: anthers 

 coherent in an oblong head, usually 

 included. . „ , „ i i . 



E. Pistillodcs in male fls. 1-3, subulate 



or sctiform ■ ■ • • 7. Gymnoinhi- 



EE. Pwtillode absent or reduced to a I"""- 



r. Anthers coherent 8. Pepon ia. 



TV. Anthers free 9. Lagcarm. 



DD Hypanthium of male fls. short; anthers 

 free or slightly coherent, usually ex- 



E. Stamens in.serted in the mouth of the 



F. ScaKn^botUim of hypanthium . . 10. Thlndiantha. 

 r». Scales in bottom of hypanthium 



2-3 ^^- Momordica. 



EE. Stamens in.scrted in hypanthium. 

 F. Male fls. in racemes. 



G. Fr, dry, fibrous, dehiscent by 



Udat top 12. Luffa. 



oo. Fr. fleshy, not fibrous. 



H. Female fls. solitary .13. EcbalUum. 



HH. Female fls. racemose or clus- 



tered U. Bryonia. 



rw. Male fls. soUtary or fascicled. 



o. .Sepals somewhat leafy, ser- . 



rate, reflcxcd 15. BenmcoM. 



oo. Sepals awl-shaped, entire, erect. 

 H. Pollen minutely munoate; pi»- 



tillfxlc 16. BrymMpms. 



HH. Pollen smooth; pistillode re- 

 duced to a small gland. 

 I. Tendrils not branched: con- 

 nective usually prwluccd 

 upward beyond loculc. . .17. Cuaimis. 

 jl. Tendrils 2-3-fid: conncc- 



live not produced Is. l,iiruuua. 



93. BEGONIACE^. 



A. Ovary wholly inferior. 



bb! Pe'tals ol'pMliate fl. growAVoge-ther-.: . . . . 2. ^V'-h^B- j«- 



AA. Ovary partly superior 3- HxUebrandxa. 



1. Begonia. 



94. CACTACE.ffi. 



A. Fl.-tube wanting. 



B. Lvs. large and persistent. 



c. Seeds black and shining ■ ■ , • . 1. '^"■"J'."; . 



ca Seeds white, dull and covered with hairs. 2. Pereskiopats. 

 BB Lvs. wanting or minute and caducou.s. 



c. Plant epiphytic, spineless: fls. small. „„,,■„,„ 



D. Flowering joints bottle-shaped. . .... 3. "anola- 



DD Flowering joints not bottle-shaped.... i. Rhipsahs. 



CC. Plant not epiphytic, usually very spiny: 

 fls. large. 

 D. Petals spreading; filaments much 



shorter than the petals - , ■ • 5- Opunlm. 



DD Petals erect and closely surrounding 

 the stamens; filaments longer than 



the petals , , 6.^opaka. 



AA Fl.-tube present, often much elongated. 



'b Plants epiphytic or nearly so, either t^at or 

 3-angled, usually spineless and always 

 with spineless fr. . 



c Sts 3-angled, bearing small spines at the 



areoles: ovary and fr. bearing large ^ ^^^,_^^^^^^_ 



cc. Sts.'^'normail'y'flat, spineless: ovary and 

 fr. bearing only minute bracts. 

 D. The sts. weak, divided into many short 



E.'Fis.1rregular ; t^^^SZ'"' 



dd!' Th^'''sts!'^st'outer' than ' the ' last', ' with [hergera. 



elongated joint-s. . ,„ „. 



E Fl.-tube very short or nearly wanting.lO. Disocactua. 

 EE. Fl.-tube very definite, often much 



elongated. nM(,„ 



F. Fls. small, diurnal 11- g ""^- 



TF. Fls. large, nocturnal .12. Eptphyllum. 



BB. Plants not epiphytic, never flat, with several 

 to many ribs. , . , i • . j 



c. Sts. globular or cylindrical, not jointed. 

 D. Plant-body covered with more or less 



definite tubercles: fr. naked. f,„,„„ 



E The plant terminated by a cephahuml J. Laclua. 

 EE. The plant without a terminal ceph- 

 alium. , 



F. Without spines except in the seed- 

 lings. . , , 

 G. Plant tumid, without woody , . , 



tubercles 14. Lophophora. 



GO. Plant with dry prominent . 



woody tubercles 15. /Iriocorjms. 



FF. With spines on the tubercles. 



G. Tubercles terete or angled, with 



various kinds of spines 16. MammiUaria. 



GO. Tubercles flattened, with peo- 



tinate spines • • -17. PeUcyphora. 



DD. Plant-body covered with more or less 

 definite ribs: fr. .scaly. 



E. Tubercles elongated, finger-like 18. Leuchten- 



EE. Tubercles, if present, always low. [bergui. 



F. Top of plant naked or nearly so.. 19. Echinocac-^ 



FP. Top of plant very woolly .20. Moiococor- 



00. Sts. often tall, cyUndrical, more-or-less IP««- 



branched, erect or climbing, sometimes 

 low and then always with spiny fr. 

 D. Flowering plants taking on various 

 forms like a cephalium, long hairs or 

 wool, peculiar bristles or spines from 

 near the top. „, , „i.„,.^,,.- 



E. Kibs Of sts. 4-7 21. Lophoctrewi. 



EE. Ribs of sts. many. 



