394 
GINKGO 
development occur on the ground during the winter. The seed is 
edible, and yields an oil. The timber is useful. 
Girardinia Gaudich. Urticaceae (i). 6 sp. trop. As., Afr. 
Githago Adans. = Lychnis Linn. 
Gladiolus (Tourn.) Linn. Iridaceae (ill). 90 sp. S. Afr., trop. Afr., 
Eur., As. Favourites in horticulture. Firs, in many sp. protandrous. 
Leaves isobilateral. 
Glaucium Tourn. ex Hall. Papaveraceae (11). 12 sp. Eur., As. G. 
flavum Crantz, yellow horned-poppy, on sea-shores in Brit. (p. 186). 
Glaux (Tourn.) Linn. Primulaceae (ill). G. maritima L., sea milk- 
wort, the only sp. , N. temp, maritime (incl. Brit.). A halophyte 
(p. 169) with fleshy leaves. The seeding plant dies after producing 
in the axil of one cotyledon a hibernating shoot, with a root of its 
own. From this new plant fresh plants arise vegetatively, the process 
being repeated for several years before flowering. Runners with scale 
leaves in whose axils renewal-shoots form, appear before the flowering 
period (see Pax in Nat . PJi. for details). The fir. has no corolla, but 
a coloured calyx. 
Glaziovia Benth. et Hook. f. Bignoniaceae (1). 1 sp. Brazil. The 
tendrils have flat discs at the tip, which adhere like those of the 
Virginian creeper (Vitis, q.v.). 
Glechoma Linn. = Nepeta Linn. 
Gleditschia Clayton. Leguminosae (11. 7). 11 sp. sub-trop. Am., As. 
The stems are usually provided with stout branched thorns (stem 
structures, arising in leaf axils). The thorn comes from the upper- 
most of a whole series of buds arranged one above the other in the 
leaf axil. No winter buds are formed, and the young apex of each 
twig dies off in winter, the next year’s growth starting laterally. 
Some sp. are used for hedges ; some yield useful timber. 
Gleichenia Sm. Gleicheniaceae. 30 sp. trop. and S. Hemisph. They 
have creeping rhizomes ; the leaves are repeatedly branched in an 
apparently dichotomous way. 
Gleicheniaceae. Filicineae Leptosporangiatae (Homosporous). 2 genera 
with 40 sp., trop., sub-trop. and S. temp. They are small ferns with 
creeping rhizomes and dichotomously branched leaves. Sorus of 
2 — 8 sessile sporangia, without indusium, with a complete transverse 
annulus, and dehiscing longitudinally. Chief genus : Gleichenia. 
Globba Linn. Zingiberaceae. 24 sp. E. Ind. and Malaya. The fir. is 
rather complex. There is a short calyx ; above this is the corolla 
tube, from the end of which spring 3 petals, a large labellum and 2 
staminodes, also the slightly petaloid fertile sta., projecting beyond 
which is the style. The ovary is i-loc. with parietal placentae. The 
lower cymes are usually replaced by bulbils ; the mass of one of these 
consists (see fig. in Nat. PJI.) of a root, springing laterally from the 
axis. 
Globularia Tourn. ex Linn. Globulariaceae. 1 7 sp. Medit., Eur. 
