2566 



PEUMUS 



PHACELIA 



The male tree has been cult, under glass in Eu., but 

 scarcely outside of botanic gardens and for its economic 

 interest. L. H. B. 



PFAFFIA (C. H. Pfaff, 1774-1852, German chemist). 

 Amarantaceae. Slender perennial herbs from Trop. and 

 extra-Trop. S. Amer., tomentose or villous, rarely gla- 

 brate : Ivs. opposite, sessile or nearly so, entire : heads or 

 spikes densely fld.; bracts and bractlets transparent: 

 fls. usually in solitary long-peduncled heads, bracteate 

 and with 2 bractlets; perianth 5-parted; staminal tube 

 long, 5-cut to the middle, the anther-bearing teeth 

 ciliate at the margin; stigma discoid or head-like, entire 

 or 2-lobed. Species about 20, one of which is known 

 more or less in gardens, although it is not certain 

 whether the plants that have been in the trade are 

 properly named. 



gnaphaloides, Mart. (Gomphrena gnaphaloldes, Vahl) . 

 Perennial, 1 ft.: sts. subshrubby below: Ivs. lanceolate, 

 10-15 lines long, 2-4 lines wide, soft, ashy gray above, 

 woolly beneath: peduncles 5-7 in. long; heads globose, 

 6-9 lines across; bracts unequal, ovate, mucronate, sca- 

 rious, the lower one villous, lateral ones longer, glabrous 

 at the base; stigma globose. Brazil, Uruguay. 

 Recorded as a stove plant in England, but the plant that 

 has been offered in this country was recommended as an 

 outdoor perennial. WILHELM MILLER. 



PFEIFFERA (named for Ludwig Pfeiffer, a dis- 

 tinguished student of cactus). Cactacese. Epiphytic 

 plants, at first erect but branches usually hanging, 

 mostly 4-angled: areoles bearing small acicular spines: 

 fls. regular, rose-colored, small: ovary and fr. spiny; 

 seeds black. This genus was included in Rhipsalis in 

 Cyclo. Amer. Hort. 



ianthothele, Web. (Rhipsalis ianthothele, Web. 

 R. cereiformis, Foerst. P. cereifdrmis, Salm-Dyck). 

 Sts. pendent, 1-2 ft. long, branching, less than 1 in. 

 diam., 4- rarely 3-angled: ribs tuberculate: areoles at 

 summit of tubercles short-woolly, soon naked, bearing 

 6-7 short bristles: fls. with very short tube, but the fl. 

 bell-shaped, purple-red without, pure white within, 

 nearly 1 in. long, little more than half as much wide: 

 fr. the size of a cherry, rose-red, with bristles like those 

 of the st. Argentina. j. N. ROSE. 



PHACELIA (Greek, cluster; on account of the 

 crowded flower-clusters of the first described species). 

 Hydrophylldcese. Annual and sometimes perennial 

 herbs, grown for the blue, purple, or white flowers. 



Low or not tall plants, with alternate simple or 

 compound Ivs. and infl. in more or less scorpioid cymes 

 or spikes: corolla deciduous as the caps, enlarges, in 

 various shades of blue, purple, or white; tube with or 

 without interval appendages, these when present in 

 the form of 5 or 10 vertical folds or projections, adnate 

 to or free from the bases of the filaments; calyx-lobes 

 commonly narrow, often enlarged upward, especially 

 in fr. ; style more or less 2-lobed : seed-coats reticulated 

 or pitted. Species 114, as defined by Brand in hft. 59 

 (IV. 251) of Engler's "Das Pflanzenfamilien" (1913), 

 American, mostly from W. N. Amer. The plants are 

 hairy, nearly smooth, or glandular in whole or in part. 

 The herbage of some of the glandular-hairy species has 

 an offensive odor. 



The genus includes the old genera Whitlavia, Eutoca, 

 Microgenetes, Cosmanthus, and others. The flowers are 

 mainly of a handsome blue or violet, many species and 

 varieties running through lighter shades to pure white, 

 but not to yellow. The annuals are of easy cultivation, 

 requiring, to bring them to perfection, a soil warm, 

 sunny, and not too moist. Some species like a sandy 

 soil, others a firmer clay. Some are erect and give the 

 best effects when planted thickly; others are more 

 spreading and therefore require considerable space. In 



height they vary from only a few inches to 2 to 3 feet. 

 The flowers are borne on more or less recurved racemes 

 that straighten as the flowering proceeds. They vary 

 from 1 inch Ipng in some species to less than y inch in 

 others. In addition to those described below there are 

 many other beautiful species of phacelia that should 

 be in the trade. The species best known in cultivation 

 is P. Whitlavia, a garden annual known as whitlavia. 



alba, 4, 13. 

 albiflora, 3. 

 bipinnatifida, 10. 

 campanulariu. ti. 

 campanula/a, 0. 

 conferta, 12. 

 congesta, 12. 

 divaricata, 8. 



INDEX. 



fimbriata, 2. 

 glandulosa, 11. 

 gloxinioides, 4. 

 grandiflora, 4. 

 humilis, 9. 

 linearis, 7. 

 Menziesii, 7. 

 mexicana, 8. 



mulliflora, 7. 

 Orcuttiana, 1. 

 Parry! , 5 . 

 tanacetifolia, 13. 

 tripinnata, 13. 

 viscida, 3. 

 Whitlavia, 4. 

 Wrangeliana, 8. 



A. Seeds transversely corrugated, not pitted or reticulated 



as in the other sections. 



1. Orcuttiana, Gray. Viscid, puberulent, about 1 ft. 

 high: Ivs. pinnatifid, somewhat lyrate, the lobes short- 

 oblong and entire: fls. sessile in the at length elongated 



'dense spikes; corolla 

 rotate - campanulate, 

 double the length of 

 the calyx, with limb 

 3-4 lines broad, 

 white, with yellow 

 eye, nearly or quite 

 destitute of internal 

 appendages : caps, 

 oval, nearly equaling 

 the narrowly spatu- 

 late (barely 2 lines 

 long) sepals, 12-14- 

 seeded; seeds oval, 

 obscurely favose-re- 

 ticulated between the 

 transverse corruga- 

 tions. Low. Calif. 



AA. Seeds pitted, punc- 

 tate or reticulated. 



B. Corolla without in- 

 ternal appendages. 



2. fimbriata, Michx. 

 (Cosmanthus fimbri- 

 dtus, Mey.). Weak 

 and diffuse annual, a 

 span high, somewhat 

 hirsute: cauline Ivs. 

 3-7-cleft or -lobed or 

 the lower lyrately divided, the lobes obtuse or roundish: 

 racemes few-fld.; pedicels filiform; calyx-lobes linear- 

 oblong or spatulate; corolla white, only 3-4 lines broad, 

 shorter than the stamens, its lobes fimbriate. Alle- 

 ghany Mts., Va. to Ala. ; April, May. 



3. viscida, Torr. (Eutoca viscida, Benth.). Fig. 2883. 

 Annual, a foot or 2 high, branching, hirsute at base, 

 very glandular above: Ivs. ovate or obscurely cordate, 

 doubly or incisely and irregularly dentate, 1-3 in. long: 

 corolla deep blue, with purple or whitish center, from 

 half to nearly an inch in diam. S. Calif. B.M. 3572. 

 B.R. 1808. R.H. 1851:361. J.H. III. 29:183; 48:302. 

 Var. albiflora, Gray. Fls. white. 



BB. Corolla bearing internal appendages. 



c. Appendages 5, small and truncate or emarginate and 



attached to the base of each filament. 



4. Whitlavia, Gray (Whitlavia grandiflora, Harv.). 

 WHITLAVIA. CALIFORNIA BLUEBELL. Fig. 2884. An 

 attractive and variable easily grown annual, about 

 1-1^2 ft. high, loosely branching, hirsute and glandular: 

 Ivs. ovate or deltoid, incisely toothed : corolla with cylin- 

 draceous ventricose tube usually an inch long, thrice 



2883. Phacelia viscida. ( X 1 A) 



