130 



KEY TO THE FAMILIES AND GENERA 



DD. Staminate fls. syiiimetrical; 

 titepal.s usually i\)uiuli8h aiul 



widfly overlappinp 3. Ptychosperme^, 



CC Stifimas usually oxct'iuric or tatoral 

 on ovary, entire or 3-lobed: If.- 

 sesms. acuminate. 



D. Spathes 2; ovary entire 4. OncOSPERMEJB. 



DD. Sptithes numerous: If.-fiegms. 

 wedge-shaped . 

 E. Ovar>* entire; younger spa- 

 dices horn-shaped 5. Iriartee-E. 



£E. Ovary deeply 3-lobed, with 

 large s t i g m a s; apadices 



club-shaped 6. Wettinie-e. 



BB. Spadices nearly always intcrfolia- 



ceous. 



c. Stigmas terminal on fr., rarely 



basal. 



D. Ovary 1-celled; spadix simple, 



with monnecious fls. immersed 



in cavities 7. Linos pa DiCEiE. 



OD. Ovary 3-celled, imperfectly so in 

 Subtribe S. 

 E. Fr. globose: spadix panicu- 

 lately branched, tlie fls. 



dioecious and pedicelled 8. Ceroxtle.b. 



EE. Fr. elongated; spadix subdigi- 

 tately branched, the fls. 

 moncEcious and not im- 

 mersed 9. Malortie^. 



CC Stigmas lateral or basal on fr., 

 rarely terminal; ovary entire. 

 D. Fls. not immersed in cavities. 

 E. Spathes 2; all the fls. or the 

 lower ones in 3's; ovary 



1-3-celled 10. Iouandre^. 



EE. Spathes numerous; ovary 3- 

 celled; spadices inter- and 

 infrafoliacous; fls. usually 

 dioecious, without bracts or 

 bractlets; perianth rather 



fleshy or leathery 11. Cham^dore^. 



DD. Fls. im^mersed in cavities, monce- 

 cious or dioecious, compressed; 

 perianth glumaceous ; style 

 often elongated, terminal or 

 lateral 12. Geonome^. 



Subtribe 1. Caryotideae. 



A- Lvs. bipinnatisect : endosperm ruminate: stam- 

 inate fls. with 3 sepals and stamens 39. Caryota, 



AA. Lvs. pinnatisect: endosperm equable. 



B. Stamens 6; calyx of staminate fls. tubular, 



truncate 40. Wallichia, 



BB. Stamens co. 



c. Calyx of staminate fls. cup-shaped, 3- 



lobed 41. Didymos- 



[perrna. 

 CC. Calyx of staminate fls. of 3 sepals 42. Arenga. 



Subtribe 2. Euareceae. 



A. 0\'ule basal, erect. 

 B. Endosperm ruminate. 



c. Stamens 3 or 6; staminate fls. minute, 

 numerous, solitary or in pairs, on 

 branches of spadix; pistillate fls. much 

 larger, solitary toward base of branches . 43. A reca. 

 CC. Stamens numerous; fls. in 3's, the middle 

 one pistillate, arranged in 2, 4 or 6 



ranks 44. Pinanga. 



BB. Endosperm equable : stamens 6 ; fls. in 3's, the 



middle one pistillate, arranged in 4 ranks.. .45. Kentia. 

 AA. Ovule parietal, more or less pendulous. 



B. Fls. arranged in 4 ranks on branches of 



spadix 46. Hydriastele. 



BB. Fls. arranged spirally on branches of spadix. 



fAll "sepals" mentioned under bb refer to 



sepals of staminate fi.s. except when 



otherwise stated.) 



c. Pistillate fls. much larger than staminate; 



sepals papery, connate at base 47. Veitchia. 



CC. Pistillate fls. not larger than staminate. 

 D. Length of sepals far surpassing petals; 



sepals narrow 48. Nenga. 



DD. Length of sepals not exceeding petals. 

 E. The sepals overlapping. 



F. Sepals triangular-orbicular; sta- 

 mens numerous; filaments short. 49. Kentiopsis, 

 FT. Sepals small, keeled ; stamens 0-24 ; 



filaments inflexed at apex 50. Arrhonto- 



EE. The sepals not overlapping. [phoenix. 



F. Filaments inflexed at apex. 



o. Sepals awl-shaped or lanceolate; 

 stamens &-12; pLstillate fls. 

 with short petals valvate at [atylis. 



apex 51. Rhopalo- 



OO. Sepals small, acute; stamens 6; 



pistillate fls. with petals a lit- [eperma. 



tie longer than the sepals 52. Dictyo- 



FF. Filaments normal; sepals narrowly 

 lancecilate; stamen^ 9-12; pis- 

 tillate fls. with petals like the 

 sepals 53. Hedyscepe* 



Subtribe 3. Ptychospermee. 



A. Endosperm ruminate. 



B. Stamens 20-30 54. Ptycho- 



[sperma, 



BB. Stamens G 55. Rhopalo- 



AA. Endosperm equable. \blaste- 



B. Lf.-segms. obliquely premorse: stamens 



numerous 56. Drymo- 



BB. Lf.-segms. narrowed at apex, or in Cyrto- [phlaus. 



stachys entire or sometimes obliquely 2- 

 toothed. 

 C. Stamens 6-15; pericarp slightly fibrous, 



smooth inside 57. Cyrtoatackyc. 



CC. Stamens 6; pericarp thick, granular, 



fibrous inside 58. Cypho- 



[phanix. 



Subtribe 4. Oncosperme£e. 



A. Staminate fls. symmetrical; sepals broad and 

 much overlapping; stigmas on fr. excentric 

 or lateral, or in Cyphosperina subterminal. 

 B. Perianth of pistillate fls. enlarged after 

 anthesis. 



c. Pericarp grumose and fibrous 59. Ctinostigma. 



CO. Pericarp thin, leathery or bony 60. Cypho- 



[sperma, 



BB. Perianth not changed after anthesis 61. Microkentia. 



AA. Staminate fls. unsymmetricai; sepals small or 

 narrow, not imbricate or only slightly so; 

 stigmas lateral on fr. or basal. 

 B. Petals of pistillate fls. connate at base, val- 

 vate above. 



c. Calyx of staminate fls. united at base 62. Oreodoxa. 



(Inch Roystonea.) 



CC. Calyx with 3 distinct sepals 63. .4cr(s/a. 



BB. Petals free. 



c. Anthers erect 64. Oncosperma. 



CO. Anthers versatile. 



D. Fr. globose: palms unarmed 65. Euterpe. 



DD. Fr. minute: palms spiny 66. Acantho- 



[phcenix. 



Subtribe 5. Iriarteeae. 



Stamens 9-15; stigmas terminal or nearly so in 



fr. : lf.-segms. turned in every direction 67. Iriartea. 



Subtribe 6. Wettiniese. 



No representatives known to be cultivated in America. 



Subtribe 7. Lino spadices. 



A. Anthers basifixed, erect. 



B. Stamens 6, 10, or 12; pistillate fls. have co 



staminodes: lf.-segms. premorse 68. Bacularia* 



BB. Stamens very numerous; pistillate fls. have 



no staminodes: lf.-segms. acuminate 69. Howea. 



AA. Anthers dorsifixed, versatile; staminodes in 



pistillate fls. 6-9: lf.-segms. acuminate 70. Linospadix, 



Subtribe 8. Cerozylese. 



Stamens 9-15: fr. with basal stigmas 71. Ceroxylon. 



Subtribe 9. Malortiese. 



Not cultivated in America. 



Subtribe 10. Iguanureee. 



A. Stigmas excentric or lat eral on f r 72. Heterospathe. 



AA. Stigmas basal or nearly so on fr. 



B. Stamens 15-20; ovary 1-celled; palm 



armed - 73. Stevensonia. 



Bd. Stamens G, with didymous anthers. 



c. Ovary 1-celled: palm armed 74. Verachaf- 



[feUia. 

 CC. Ovary 3-celled : palm unarmed 75. Dypais. 



Subtribe 11. ChamEedoreEe. 



A. Fls. dioecious or moncecious in different 



spa<lices, spirally arranged 76. Chamae- 



AA. Fls. moncecious in the same spadix. \dorea. 



B. The fls. arranged in elongated heaps or 

 clusters. 



c. I nfl. from among t he lvs 77. Ga ussia. 



CC. Infl. from below the lvs, ... 78. /lyophorbe. 



BB. The fls. sparse, solitary or in pairs 79. Roscheria, 



