ARTIFICIAL KEY TO FAMILIES 71 
Sereap milky Gwe see. 6 06 MORACEARL Pe. 194 
Boe NOUL TTC ys ky (Kale ey el eee ee Sl 80 
Boe dig Ot present. “(43) 2 . 3. 6. © 6 « © «fe! « o pou 
MARYS SD LCSCM te g(a) he hice” cal) a ude we ce sa Se Ras Ge, eee PO 
31. Ovary of 1 cell, with 1 seed. (45) . . . Myricacear. Pg. 177 
31. Ovary folliculate, many seeded. (46) . . SaALIcACcEAE. Pg. 167 
32. Both pistillate and staminate flowers in catkins 
: BETULACEAE. Pg. 180 
32. Pistillate flowers subtended by an “ involucre, which becomes 
a bur or acup at maturity . . . . . . FAGACEAE. Pg. 185 
40. 41. 42. 
33. Fruit a key (Samara) . we Megan” hha Ree coe cong ge CRG 
33. Fruit a rounded bur-like head 
: Liquidamber in HAMAMELIDACEAE. Pg. 306 
33. Fruit : a drupe or berry. ‘ a deo) 
33. Fruit a single seeded achene with a plumose ‘sll, 
Clematis in RANUNCULACEAE. Pg. 248 
34. Fruit a double key. (47) . . . . . +. ACERACEAR, Pg. 389 
Peet: 2. Kingler keys -(48) of eke Me a le ee ee Oe Se 
35. Leaves simple .. . aves wie, 's, ULMACHAR, > “Pe ioe 
35. Leaves of several leaflets He Froginus in OLEACEAE. Pg 485 
Bea VeSE CAIGCETERGG) 5) a's dre, “a ator ee lel ys cee (a Pham ad 37 
36. Leaves opposite . . . WShepherdia in ELAEAGANACEAE, Pg. 418 
3/7. Calyx 4- or 5-parted . . . « ww, « » THYMELEACEAE. Pg. 417 
eee OR paTcemers Ci is0) ke LP re SON ole a is Pe aed es 
os. Stamens 40r5 ... . . «. «. ‘+ » MSANTALACEAE, Pg. 198 
emmecamens: (9) 6 isi les (atl Soe ey Woes, 1 BAURACEARY (Pas 266 
Flowers without Petals, Herbs 
soweaves alternate or all from the root. . . « ... . « 40 
MEPEEIUCSMOUPORUS vo. ie fae Ma) ied a hme eR ke he te 7 Pei ee 
40. Plant entirely aquatic, leaves dissected, the segments thread- 
like: + . a, Gard Vek BA 
40. Plants terrestrial, eed not dissected, not thread: like Poe kone ae 
41. Leaves alternate . . . . . . . . PODOSTEMACEAE. Pg. 295 
41. Leaves in whorls . « « i : . CERATOPHYLLACEAE. Pg. 243 
42. Stipules present, sheathing the "stem above the joints. 
(ee osiaees es os oe oe POLYEONACKAR, | Py 200 
os SUES CEM TEV 0) BOR ae oe ar i a ma 
