KEY TO THE FAMILIES AND GENERA 



109 



113. DIAPENSIACE^E. 



A. Corolla persistent; staminodes 0. 



B. Fla. sessile 1. Pyxidan- 



[thera. 



BB. Fla. pedunculate 2. Diapensia. 



AA. Corolla deciduous; staminodes 5. 



B. Staminodea small, scale-like, separate ; 



corolla-lobes crenate 3, Shortia, 



BB. Staminodes long, linear, separate; corolla- 

 lobes fimbriate 4. Sckizocodon. 



BBS. Slaminodes spatulate, connate with sta- 

 mens; corolla-segms. entire 5. Galax. 



114. PLUMBAGINACE^E. 



A. Calyx-limb usually spreading, scarious and 



colored. 

 B. Lvs. usually needle-like: styles distinct at 



angles of ovary; stigmas sub-capitate. ... 1. Acantholi- 

 BB. Lvs. flat: styles as above; stigmas capitate, [mon. 



oblong or linear; infl. cymose or dense or 



scape 1- to few-fid 2. Statice. 



BBS. Lvs. flat or linear-subulate: styles shortly 

 subconnate at vertex of ovary; stigmas 



linear; scape 1-headed 3. Armeria. 



AA. Calyx-lobes or teeth erect with merely scarious 

 sinuses. 



B. Stamens free; calyx glandular 4. Plumbago. 



BB. Stamens adnate to middle of corolla; calyx 



not glandular 5. Cerato- 



[stigma. 



115. PRIMULACEJE. 



A. Corolla-lobes imbricated in quincunx fashion. 

 B. Plants aquatic: ovules anatrophous; um- 

 bilicus basal 1. Hottoni*. 



BB. Plants terrestrial: ovules semi-anatropous; 

 umbilicus ventral. 



c. Caps, dehisces by a lid at top 2. Soldanella. 



cc. Caps, dehisces by valves. 



D. The corolla-lobes bent back 3. Dodecatheon. 



DD. The corolla-lobes spreading or ascend- 

 ing. 

 B. Stamens affixed to base of corolla; 



anthers long-acuminate 4. Cortusa. 



EE. Stamens affixed to corolla-tube; an- 

 thers obtuse. 



F. Corolla-tube usually longer than 

 calyx. 



o. Caps, many-seeded 5. Primula. 



QG. Caps. 1-2-seeded 6. Douglasia. 



FF. Corolla-tube as long as calyx or 

 shorter: caps, few or many- 

 seeded 7. Androsace. 



AA. Corolla-lobes convolute in the bud: ovules 

 semi-anatropous; umbilicus ventral. 



B. Caps, circumscissile 8. Anagallis. 



BB. Caps, longitudinally dehiscent by valves. 



c. Lobes of corolla bent back 9. Cyclamen. 



cc. Lobes of corolla not bent back. 



D. Corolla-lobes 5H>: testa of seed with a 

 firm epidermis. 



E. Staminodes 10. Lysimachia. 



EE. Staminodes 5, each corolla -lobe 



curved around its stamen 11. Steironema. 



EEE. Staminodes 5, tooth-like; corolla- 

 lobes not encircling stamens 12. Naumbergia. 



DD. Corolla-lobes usually 7: testa of seed 



with a lax epidermis 13. Trientalis. 



The genus Glaux may be met with occasionally in cultivation. 



116. MYRSINACE^. 



A. Staminodes 5; corolla gamopetalous. 

 B. Corolla cylindrical, shortly 5-lobed: fr. many- 



'1 1. Theophrasta. 



BB. Corolla subrotate, deeply 5-parted: fr. 1- 



to many-seeded 2. Clavija. 



BBS. Corolla rotate-campanulate, deeply 5-cut: 



fr. few-seeded 3. Jacquinia. 



AA. Staminodes 0; corolla gamopetalous or poly- 



petalous: fr. 1 -seeded. 

 B. Corolla imbricated; fls. fascicled, lateral or 



axillary 4. Myrsint. 



BB. Corolla convolute; panicles terminal or 



terminal and axillary 5. Ardisia. 



The genua M&sa is also accounted for. 



117. SYMPLOCACE^. 



The only genus Symplocos. 



118. STYRACACE^E. 



A. Fr. superior, globular or ovoid, not ribbed nor 



winged 1, Styrax. 



AA. Fr. inferior, elongated ribbed, or winged. 



B. Infl. panicled, many-fld., drooping, sub- 

 terminal 2. Pterrostyrax. 



BB. Infl. of few-fld. fascicles, often lateral 3. HaUsia. 



119. SAPOTACE^J. 



A.. Corolla-lobes, calyx-segms. , stamens and 



staminodes {when present) isomeroua. 

 B. Staminodes 0: seeds usually albuminous: 



fls. 5-merous, rarely 6-7-merous 1 Chrysophyl- 



BB. Staminodes small, usually affixed higher . [turn. 



than stamens, sometimes few or 0: seeds 



not albuminous: fls. 4-5-merous 2. Lucuma. 



BBB. Staminodes alternate with stamens, rarely 



affixed higher; seeds albuminous 3. Sideroxylon* 



AA. Corolla-lobes and calyx-segms. isomerous: 



stamens twice as many or more 4. Isonandra. 



AAA. Corolla-lobes usually 2 or 3 times as many as 

 calyx-segms. 



B. Calyx-segms. 1 series 5. Bumelia. 



BB. Calyx-segms. 2 series 6. Mimusops. 



The genus Pouteria is now described in this family. 



120. EBENACE^. 



A. The fls. usually hermaphrodite; stamens in 1 



series 1. Royena. 



AA. The fls. dioecious. 



B. Fls. usually 3-merous; stamens 3-, com- 

 monly 9; ovary 3- or 6-celled 2. Maba. 



BB. Fls. usually 4-5-merous; stamens 4-8, usu- 

 ally in 2 series; ovary 4- or 8-celled 3. Diospyros. 



121. OLEACE^. 



Fr. didymous or septicidally divisible into 



two: corolla-lobes strongly imbricate: 



ovules laterally affixed near base; seeds 



erect, without endosperm ; radicle 



inferior 1. JASMINE TRIBE. 



Fr. terete or compressed parallel to the 



septum, loculicidally dehiscent; ovules 



pendulous from apex of cells; seeds 



winged, pendulous; radicle superior. ... 2. LILAC TRIBE. 

 Fr. entire, dry, indehiscent, winged, a 



samara, compressed contrary to the 



septum; ovules twin, pendulous from 



apex of cell; seeds pendulous with en- 

 dosperm; radicle superior 3. ASH TRIBE. 



Fr. fleshy and indehiscent, a drupe or 



rarely a berry, not lobed; ovules twin, 



laterally affixed near the apex; seeds 



solitary, suspended or pendulous, with 



endosperm; radicle superior 4. OLIVE TRIBE. 



1. Jasmine Tribe. 



Fr. fleshy, indehiscent, didymous or by abortion 



simple 1. Jasminum. 



2. Lilac Tribe. 



A. Corolla-lobes imbricate. 

 B. Ovules 3-4 in a cell: Ivs. pinnate and fls. 



white: corolla-lobes shorter than tube 2. Nathusia. 



BB. Ovules 4-10 in a cell: Ivs. entire or 3-folio- 

 late and fls. yellow: lobes many times 



longer than tube 3. Forsythia. 



AA. Corolla-lobes induplicate-valvate; tube long 



or short: ovules 2 in a cell; seeds albuminous. 4. Syringa. 



3. Ash Tribe. 



A. Lvs. usually pinnate: fr. elongate, with a 

 terminal wing, generally 1-seeded by abor- 

 tion 5. Fraxinua. 



AA. Lvs. undivided: fr. ovate or orbiculate, sur- 

 rounded by a wing, usually 2-celled and 2- 

 seeded 6. Fontanesia. 



4. Olive Tribe. 



A. Corolla of nearly distinct petals which are long 



and linear 7. Chionan- 



AA. Corolla-lobes imbricate, broad and obtuse. \thut. 



B. Endocarpof drupe thinly crustaceoua 8. Phitlyrea. 



BB. Endocarp of drupe hard and somewhat 



woody 9. Oamanthu*. 



AAA. Corolla-lobes induplicate-valvate. 



