170 BOTANY. 



Tagetes* micrantiia, Cav. — Annual, smooth, 2-6' high ; stem simple 

 or nearly so; leaves opposite, entire and filiform or pinnately parted, and 

 the divisions filiform ; flowers terminal ; scales of the involucre in a single 

 series somewhat united at base, abruptly truncate and sometimes bristle- 

 tipped ; rays white, 1-3 in a head, 1-2" long, entire or slightly denticulate ; 

 disk-flowers about 5 ; pappus of two rough awns nearly as long as the 

 distinctly striate linear achenia, and of 2-3 scales half as long as the awns, 

 which they sometimes enclose. — Sanoita Valley, Southern Arizona, on 

 rocky hillsides (616). 



PEcrisf filipes, Gray. — Annual, much branched ; leaves smooth, 

 narrowly linear, 12-18" long, less than 1" wide, with numerous glands, 

 2-3 bristles on either side at base ; peduncles capillary, more than an inch 

 long; involucre of five lanceolate scales, with more or less scarious margins, 

 frequently gland-bearing ; rays exserted half their length, not more in 

 number than the disk-flowers (5) ; disk-flowers half as long as the rays ; 

 achenia linear, hairy ; pappus usually of two stiflish awns, which are some- 

 what thickened at base and slightly scabrous above, or occasionally reduced 

 to one awn and a crown of minute scales. An exceedingly variable species, 

 which Bentham and Hooker, in Gen. Plant., have assigned to the older P. 

 Taliscana, Hook. & Arn. I can see no warrant for this, if the description 

 in Bot. Beechey be correct. It should, however, be stated that the plant 

 appears there to have been described from imperfect material, and more 



* Tagetes, Linn. — Heads heterogamous, radiate ; ray- and disk-flowers both fertile, or heads some- 

 times homogamous, the rays being absent. Involucre cylindrical, the bracts 1-seried and more or less 

 united, rarely a single small exterior bract is present. Receptacle flat, often small, naked or somewhat 

 alveolate-fimbrillate. Kay-corolla ligulate; disk-flowers perfect and fertile, regular, tubular, the limb 

 often enlarged, 5-cleft. Anthers at base obtuse, entire. Style-branches of the disk-flowers slender, truncate, 

 penicillate or short appendiculate. Achenia linear, attenuate at base, compressed or augled, hardly 

 striate, with a [somewhat] conspicuous callosity at base. Pappus variable [in our species, micrantiia, of 

 •J awns and 2-3 shorter scales]. — Erect, branching or diffuse glabrous herbs, with the leaves and involucre 

 having distinct, strongly scented glands. — Benth. & Hook. 



tPECTis, Linn. — Heads hetoiogamous, radiate; ray-llowers in a single series and fertile, as the 

 disk-flowers also. Involucre cylindrical or campanulate, the free, equal bracts in a single series. Recep- 

 tacle small, naked. Rays with a small or narrow blade, spreading, entire or 3-toothed ; disk-flowers 

 perfect, the ampliate tube short, equally or unequally 5-cleft. Anthers obtuse, sub-entire at the base. 

 Styles of the disk flowers elongated, slender, somewhat hairy, with very short, obtuse branches. 

 Achenia liuear, somewhat angled, delicately striate. Pappus of few or many bristles, nfteuer smaller, 

 fewer or simply reduced to scales in the ray than in the disk, or sometimes consisting entirely of small 

 scales resembling a crown, or with these and the bristles intermixed. — Herbs, the leaves and iuvolucral 

 scales of which often abound in stroug-sceuted glands. Flowers yellow [in P. imberbis purple]. — Benth. 

 &, Hook. 



