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PACIFIC SCIENCE, Yol. XIV, October I960 
52. Stamens more than twice as many as the petals, 
53. Leaves opposite, 
54. Stipules present, 
55. Sepals 2; ovary 1 -celled, 
56. Leaves terete .. 47. Portulaca samoensis 
56. Leaves flattened, 
57. Petals 2-4 mm. long, closing at noon; leaves wedge-shaped 
...46. P. oleracea 
57. Petals 10-12 mm. long, closing at 3 P.M.; leaves obovate to orbicu- 
lar 45. P. lutea 
55. Sepals more than 2; ovary several-celled, 
58. Ovary partly inferior; fruit smooth, with single seed germinating while 
still on the tree ...71. Rhizophora Mangle 
58. Ovary superior; capsules spiny; seeds germinating after falling 
66. Triumfetta procumbens 
54. Stipules absent; filaments united into a tube, 
59. Involucral bracts 3-1; ovule ascending 67. Malvastrum coromandelianum 
59. Involucral bracts none; ovule pendulous or horizontal 68. Sida fallax 
53. Leaves alternate 60a. Aleurites moluccana 
52. Stamens twice as many as petals or less, 
60. Ovary inferior, 1 -celled; trees, 
60 A. Sepals and petals 4-5; ovules 2-5; stamens 10 72. Terminalia samoensis 
60 A. Sepals and petals 3; ovule 1; stamens 3-4 48a. Hernandia sonora 
60. Ovary superior, 
61. Leaves compound, 
61A. Trees; fruits globose 65a. Sapindus Saponaria 
61 A. Vines or herbs, 
62. Leaves opposite; ovary 5-6-celled, in fruit each coccus 2 -horned 
59. Tribulus cistoides 
62. Leaves alternate; ovary 1 -celled, unarmed, 
62 A. Flowers regular; pods dehiscing into 1 -seeded joints; seeds 4-5 
cm. in diameter 54. Entada phaseoloides 
62A. Flowers papilionaceous; pods dehiscing longitudinally; seeds 
smaller, 
63. Pod septate internally between the seeds 55. Mucuna mens 
63- Pods not thus septate, 
64. Keel of corolla spiral 56. Phaseolus vulgaris 
64. Keel not spiral, 
64A. Flowers with 4 petals regular, 1 slightly the larger; pods 
prickly.. 52a. Caesalpinia Bonduc 
64A. Flowers papilionaceous; pods smooth, 
65. Style bearded towards the summit; upper stamen free.... 
58. Vigna marina 
65. Style beardless near tip, 
66. Calyx asymmetric from much enlarged upper lip; 
seeds beanlike; upper stamen connate to the 
middle 54. Canavalia microcarpa 
66. Calyx nearly symmetric; seeds compressed quadrate 
53a. Diocle a reflexa 
61. Leaves simple; shrubs or trees, 
