Horticulture 221 ‑ LANDSCAPE PLANTS, Fall 2008

4 credits: 2 ‑ 1 hour lectures

2 ‑ 2 hour laboratories



Instructor:      Dr. James E. Klett              Office Hours: 9:00-10:00 a.m. Tuesday or by appt.

            Office: 219 Shepardson           Office Phone: 970-491‑7179 Home Phone:  970-493‑3542

Cell Phone: 970-218-0104 Email:  jim.klett@colostate.edu


Teaching Assistant:    Eric Hammond

Phone: 719-338-2511

E-mail: e_hammond@yahoo.com  or  eham@simla.colostate.edu



There is no one text which fits the needs of this course.­  However, the following book will be used often ‑‑ Manual of Woody Landscape Plants by Michael A. Dirr, Stipes Publishing Company, 1998 (5th edition).  Reference texts will be listed on a separate sheet.  There is also the "Photographic Manual of Woody Landscape Plants" that you might want to buy to complement the regular textbook, but it is not required for the course.  It is also available on CD-Rom.


Lecture and Laboratory:

Lectures will be in Shepardson 212.  The majority of the lab time will be spent in the field (weather permitting) learning proper nomenclature and identifi­cation of plant material.  The current week's plant specimens will be available in Shepardson Room 112, which is open for study whenever Shepardson Building is open to public.  Labs will meet initially in Shepardson 102 on Tuesday and on Thursday.  Pa­st plant specimens will be kept in the refrigerator inside Shepardson Room 112.


Field Trip:

An all-day field trip to the Denver Botanic Gardens, Denver City Park and Fairmount Cemetery in Denver is planned.  The trip will be in October to coincide with fall foliage color.  It is important that you attend this field trip.  Those unable to attend will have to do an extra assignment.  The extra assignment will be to include 50 plants instead of twenty-five (25) for the fall foliage color project.


Plant Identification:

Plant list and pictures of woody plants (trees, shrubs, vines and conifers) can be found on a website.  To access course material: klett.agsci.colostate.edu, click on H221



Nine plant identification quizzes will be given during the semester.  (Eight will count for the final grade).  The lowest grade will be dropped.  Quizzes may be either indoors or outdoors and will be announced.  Plants must be learned by leaf, stem and bud characteristics for identification quizzes are cumulative and cover plants from the first week of the semester.  Three one hour exams covering both lecture and laboratory material will be given approximately 5, 10, and 14 weeks into the semester.  The final written exam will cover the last fourth of the course and the final lab identif­ic­ation exam will cover all the plant material studied througho­ut the course.  Generally quizzes will be given in Thursday's lab of each week in Room 102 and 114.  No make-up quizzes will be given.  Only under extreme circumstances will a quiz be allowed to count double since you can drop one quiz out of the nine to be given.


Ram CT:

            This class also has a Ram CT component – check often for class announcements.




Special Project:

Each student will record the fall foliage color of at least 25 different tree, shrub, or vine species in the Fort Collins or surrounding area.  You should list the scientific name, common name, fall foliage color, date observed, specific location of plant material, how utilized in the landscape, and if you think it is used properly.  (Listing must be in alphabetical order by genus and plants must be numbered (#1 to 25).  Use a specific species only once in your list.)  The plants must be showing some fall foliage color when you record them.  You will also be required to select three different woody plants and record the first date of fall foliage color observation and follow that plant weekly until the leaves drop from the woody plant.


 Example:    1.            Aesculus glabra, Ohio Buckeye, orange-red, Oct. 10-15, 324 12th Avenue, Fort Collins, CO. ‑ street tree and too large for this residential property.


(This should be a teaching aid to help you learn woody plants and can easily be done on your walks to and from campus.)


Objectives of Course:

The student will learn a systematic approach to proper nomenclature, identification, ornamental characteristics, culture, hardiness, pests, propagation, and use of hardy coniferous and deciduous trees, shrubs and vines.  Approximately 270+ different plants will be studied including many cultivars commonly used in the landscape nursery industry, many of which are native to the Rocky Mountain area.  Ornamental characteristi­cs such as flowers, fruit, fall color and winter texture will be stressed along with their landscape use.  Particular cultural and pest problems of various species will also be discussed.


Grading Allocations:


Plant identification quizzes: (total of 8 quizzes)                                  40% of grade

    (9th quiz or lowest grade will be dropped)


Three one‑hour examinations approximately on the 5th week,                 35%

    10th week, and 14th week (3rd exam will include a take‑home           

    part dealing with utilizing plant material in landscape situations)                                                                                                      


Special Problem (fall foliage color project)                                      5%


Final Examination (half written; half identification)                         20%

   (10% Final I‑D and 10% Final written exam over                                              

    the last 1/3 of the course)                                                             100% Total


Letter grades will generally fall: 92-100 = A; 90-91 = A-; 87-89 = B+; 82-86 = B; 80-81 = B-; 77-79 = C+;

70-76 = C; 60-69 = D; below 60 = F.  Attendance will be considered in borderline cases. 


No cell phones, blackberries, etc. will be allowed to be used in class, especially when taking any quizzes or exams.


Grading Allocations for Identification Quizzes:


Students often have problems deciphering the grading allocations for plant quizzes.  The following examples should serve to alleviate the confusion.


Scientific and common names are required:  Ex.         Acer ginnala ‑ Amur Maple

                                                                          5        3                2         = 10pts




Each plant is worth ten (10) points:     Genus Name                               = 5

                                                                        Specific epithet (species)         = 3

                                                                        Complete common name        = 2


Every spelling mistake results in the loss of one‑half point.  If one misses in excess of three letters per word, no credit will be given.


The common name must be complete.  Maple by itself means nothing, nor does the term Amur.  Together they refer to a specific Maple.


If a cultivar or variety is used as a quiz plant the point distribution changes.


Example: Cornus florida 'Fastigiata' ‑ Fastigiate Flowering Dogwood

       5         2           1               1            1                                = 10pts


   Cornus florida rubra ‑ Pink Flowering Dogwood

                   5           2          1                 1            1                             = 10pts


The cultivar 'Fastigiata' can also be correctly written as Cornus florida cv. Fastigiata without single quotes.  The variety rubra can be written Cornus florida var. rubra.  Both are acceptable under the Rules of Nomenclature for Cultivated Plants.  However, for this course you will use the first two methods described.


The Green Revolution:  It's in your hands.  Have an educational semester!  Eat, drink and sleep woody plants during this semester!


If any student has a learning disability, please inform instructor during the first week of the semester.