Flora of Eniwetok— St. John 
317 
16. Stems triangular, solid; leaves 3-ranked; anthers basifixed, 
32. Floral scales 2 -ranked, laterally compressed, 
33. Spikelets lanceolate; blades nodulose 27. Cyperus javanicus 
33. Spikelets linear; blades not nodulose 28. C. odoratus 
32. Floral scales spiral, merely concave 28. Fimbristylis atollensis 
2. Flower parts in 5’s (rarely in 4’s); leaves netted veined; herbs, shrubs, or if trees with second- 
ary wood. 
DICOTYLEDONES 
34. Leafless, cordlike parasites ----- 48. Cassytha filiformis 
34. Not so, 
35. Perianth in 1 series or apparently so, 
36. Leaves opposite, 
37. Stipules present, 
38. Ovary 3-4-celled, 
39. Florets in heads surrounded by a calyxlike involucre; sap milky, 
40. Stems prostrate; blades less than 1 cm. long 63. Euphorbia thymifolia 
40. Stems erect; blades larger, 
41. Blades glabrous; plant forming tufts 61. E. Chamissonis 
41. Blades hirsute; stems simple 62. E. hirta 
39. Flowers not in involucrate heads, 
42. Outer stamens opposite the sepals; blades oblong-obovate, unlobed 
64. Phyllanthus amarus 
42. Outer stamens alternate with the sepals; blades suborbicular, deeply 
palmately lobed 65. Ricinus communis 
38. Ovary 1-celled; fruit an achene 35. Fleurya ruderalis 
37. Stipules none, 
43. Perianth deeply 3-5 -parted, dry, scarious, 
44. Style single; stigma capitate, 
45. Perianth 5 mm. long; blades rough hairy 37. Achyranthes aspera 
45. Perianth 5. 5-6.5 mm. long; blades soft silky hairy 38. A. velutina 
44. Styles 2-3, 
46. Sepals 3; pod not splitting at maturity 40. Amaranthus viridis 
46. Sepals usually 5; pod splitting at maturity 39. A. dubius 
43. Perianth funnelform, petaloid, 
47. Tree; fruit with gland-tipped, spiny, longitudinal ridges 
44. Pisonia grandis 
47. Herbs; fruit not spiny ridged, 
48. Flowers axillary, solitary, 2.5-5 cm. long 43. Mirabilis Jalapa 
48. Flowers less than 5 mm. long, in terminal spikes, 
49. Calyx tube glandular; stamens 2-3 - 
. 41. Boerhavia diffusa var. diffusa 
49. Calyx tube glabrous; stamens 3-6 42. B. diffusa var. tetrandra 
36. Leaves alternate, 
50. Fruits juicy, fused into a head; tree 34. Ar to carpus incisus 
50. Fruits dry capsules, distinct, 
50A. Herbs (Turn back to the first no. 37.) 
50 A. Trees; fruit an achene enclosed in a loose, fleshy envelope. -..48a. Hernandia sonora 
35. Perianth in 2 series or apparently so, 
51. Parts of the inner perianth series all or all but 2 separate or united only at the very 
base, 
