604 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
KEY TO THE GENERA. 
Carpels 1-seeded. 
Stipules foliaceous, resembling the leaves, the leaves 
thus appearing whorled; stems 4-sided; corolla. 
rotate. ......... 2c eeeeee eee 1. Gattum (p. 604). 
Stipules more or less connate-sheathing, lacerate, the 
leaves distinctly opposite; stems not con- 
spicuously 4-sided; corolla salverform.......... 2, Crusea (p. 606). 
Carpels several to many-seeded. 
Seeds winged; corolla long-tubular, bright red; leaves 
broadly lanceolate, 2 to 5 em. long; ovules and 
seeds numerous. .............02-22022002000- 3. Bouvarpta (p. 606). 
Seeds not winged; corolla short, salverform, never 
bright red; leaves narrower, mostly less than 
2 cm, long; ovules and seeds several. 
Top of the capsule extending beyond the hypan- 
thium... 2.2.2.0... 20.2.2 4, Housronta (p. 607). 
Top of the capsule not exceeding the hypan- 
thium..... 2.222.222... eee eee 5, OLDENLANDIA (p. 608). 
1. GALIUM L. Bepstraw. 
Low annual or perennial herbs with 4-angled stems and small whorled leaves, 
the stipules often as large as the leaves; flowers small, perfect, white, yellowish, or 
purple, in axillary or terminal cymes or panicles; sepals often obsolete; corolla rotate, 
with 3 or usually 4 lobes; ovary 2-celled, with one ovule in each cell; styles 2; stigmas 
capitate; fruit of 2 nearly separate, 1-seeded carpels, either glabrous or hispid, dry 
or fleshy. 
KEY TO THE’ SPECIES. 
Fruit covered with long straight hairs, 
Corolla purplish, the lobes abruptly long-acuminate. 
Leaves linear or linear-oblong, nearly glabrous; stems 
puberulent............. . 1. G. rothrockii. 
Leaves oblanceolate or elliptic, strongly pubescent 
stems hirtellous..................- -. 2. G. wrightii. 
Corolla white or yellowish; petals obtuse or merely acute. 
Leaves ovate to elliptic-lanceolate, thick, fleshy....... 3. G, acutissimum. 
Leaves linear-oblong, thin...............2..22.220.2.. 4. G. fendleri. 
Fruit glabrous or covered with hooked hairs. 
Fruit scaberulous to glabrous, never with hooked hairs. 
Leaves acute; bracts persistent at the base of the fruit... 5. G. microphyllum. 
Leaves obtuse; fruit not bracteate..............22..... 6. G. brandegei. 
Fruit covered with hooked hairs. 
Stems stout, erect; leaves 3-nerved.................--. 7. G. boreale. 
Stems slender, weak, usually reclining; leaves mostly 
. l-nerved, , 
Leaves not cuspidate-pointed; slender annual.... 8. G. proliferum. 
Leaves cuspidate-pointed; annuals or perennials. 
Pedicels scarcely exceeding the bracts; stout 
plants, usually annuals. 
Leaves linear or oblanceolate.............. 9. G. aparine. 
Leaves elliptic. ..................... 10. G. flaviflorum, 
Pedicels much exceeding the bracts; pe r ennials. 
Leaves broadly elliptic; corolla yellowish; 
stems nearly smooth..............-. Ll. G. triflorum. 
Leaves narrowly oblong; corolla purplish; 
stems very rough..................-.12. G. asperrimum, 
