138 
1. M. verticillata L. (CARPET-WEED. ) Prostrate, forming patches: leaves spat- 
ulate, clustered in whorls at the joints, where the 1-flowered pedicels form a sort of 
sessile umbel: stamens usually 3.—Sandy river banks and cultivated groundsthrough 
ont southern Texas. 
9. M. Cerviana Seringe. Like the last, but with very narrow glaucous leaves.— 
Collected by Palmer near Bluffton (Llano County); probably occurring farther 
westward, as it has been found in New Mexico and Arizona, 
3. M. Cambessidesii has very short and broadly obovate leaves, but in other 
respects resembles M. rerticillata (for which it was mistaken in Contr. Nat. Herb., ii. 
39) (Glinus Cambessidesii Fenzl.).—West of the Pecos. Seed characters and others 
have been used to place this species in a separate genus, Glinus, but Bentham & 
Hooker have reduced it to Mollugo. | 
UMBELLIFERA. (PARSLEY FAMILY.) 
Herbs, with alternate mostly compound leaves whose petioles are 
expanded or sheathing at base, small flowers usually in compound 
umbels (rarely in heads), the calyx (its limb obsolete or a mere 5 toothed 
border) entirely adhering to the 2-celled 2-ovuled ovary, the 5 petals 
and 5 stamens inserted on the disk that crowns the ovary and surrounds 
the base of the 2 styles, and fruit consisting of 2 seed-like dry carpels. 
A large and difficult order, as the flowers are much alike in all, and the 
chief characters must be obtained from examination of the surface and 
cross-sections of the mature fruit. No attempt should be made to name 
most of the species without mature fruit. The following special terms 
are used: commissure, the inner face of the carpels; ribs, 5 of which 
occur on each carpel lengthwise, some or all of which may be winged, 
and consisting of 1 dorsal (in the middle of che carpel back), 2 laterals 
(at the margins of the carpels), and 2 intermediates ; 4 secondary rvbs oc- 
casionally occur intermediate between the 5 primary ones; oil-tubes, 
longitudinal canals containing aromatic oil and lodged in the fruit 
usually between the primary ribs and in the commissural face; stylopo- 
dium,the thickened and cushion-like base of the styles; wmbellets, second- 
ary umbels; énvolucels, involucres of the umbellets; bracts and bractlets 
are applied to the constituent leaves of the involucre and involucel re- 
spectively. The following is an artificial key to the genera: 
I. Fruit bristly, prickly, or scaly. 
* Fruit bristly or prickly along the ribs: umbels compound: leaves pinnately decom. 
pound. 
1. Daucus. Stylopodium depressed or wanting: calyx-teeth obsolete: flowers 
white. 
2, Cuminum. Stylopodium conical: calyx-teeth prominent and unequal: flowers 
rose-colored. 
** Fruit withoat ribs, prickly or scaly all over. 
12. Eryngium. Flowers ina globose or oblong head: fruit with tuberculate scales: 
leaves mostly coriaceous and prickly. 
13. Sanicula. Flowers in irregularly compounded umbels: fruit covered with 
hooked prickles: leaves mostly palmate, witb toothed cer incised lobes. 
