962 BROADHURST: STRUTHIOPTERIS IN NORTH AMERICA 
Rhizome scales never with a black median line; lamina 
broadly lanceolate to lanceolate, 2.5-4.5 times as 
half to third of the lamina 6. S, Plumieri. 
Plants terrestrial; rhizome inclined to erect; rhizome scales and 
Stipe scales never with a black median line; stipes 
clustered at the apex of the rhizome, the fertile ones 
partly, or oftener wholly, shining chestnut to black; 
mature lamina fully punctate by transmitted light (see 
S. Spicant for ronan se pinnae conspicuously 
dilated at their sae (exc xonti). 
Sterile enue gradua pee at the we (type F-G, 
out aie pinnae); vein spaces 8-15 to I cm. 
thats erect (43 cm. high, in type); vein spaces 8-10 
o 1 cm.; fertile pinnae not dilated at their bases. 5. S. Maxonit. 
Rhizome creeping or stoloniferous; vein spaces 10-15 
to 1 cm.; fertile pinnae conspicuously dilated at 
their bases. 
Sterile fronds of two types in texture and position, 
m. long; rhizome apparently not stolonif- 
erous; pinnae 36-80-jugate, 3-15 times as long 
8. S. Spicant. 
— —— — in ihesiaets at least, II-20 cm. 
éA Jricate * 
&) , pinnae 10-22 JUBALE, 
mes as long as wide. g. S. stolonifera. 
Sterile lamina abruptly reduced at the base (type B-D, 
with vestigial pinnae except in S. L’Herminieri); 
vein spaces 6-8 to I cm 
Stipes (of the sterile fronds, at least) without scarlike 
vestigial pinnae; lamina lanceolate, 5-11 cm. wide; mee 
pinnae mainly falcate, ascending. 4. 5. L' Herminier* 
Stipes with vestigial pinnae; lamina elliptical, ovate- 
lanceolate, oblong-deltoid, or deltoid, 12-32 cm. 
ide; pinnae mainly straight, diverging. 
Lamina of mature fronds deltoid to piace BH. 
or ovate-lanceolate and very abruptly reduce 
eke w (type A or B); lower pinnae nurses 
shorter abruptly reduced to semicircular lobes; 
sporophyls fertile on the dilated bases of the : 
pinnae. 2. S. exaltala- 
ina of mature fronds broadly elliptical, less 
abruptly reduced below (type D); lower pinnae 
distant or appearing so, leas shorter; sporo- 
yls not fertile on the dilated bases of the 
pinnae. 
S. ENsIFoRMIS (Liebm.) Broadh.; Maxon, Contr. 
Herb. 13: 17. 1909. 
3. 3. jamaicensts 
U. S. Nat 
